3Slides_Diversification
战略管理-竞争优势与全球化(英文第六版)

• Important Elements of Success
Developing strategy
Implementing strategy
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7
Competitive Landscape
• Strategic Management Process
The full set of commitments, decisions, and actions required for a firm to achieve strategic competitiveness and earn above-average returns
Describe strategic intent and strategic mission and discuss their value.
Define stakeholders and describe their ability to influence organizations.
Copyright © 2004 South-Western. All rights reserved.
5
The Strategic Management Process
Figure 1.1
Copyright © 2004 South-Western. All rights reserved. Copyright © 2004 South-Western. All rights reserved. 6
• Strategic Competitiveness
When a firm successfully formulates and implements a value-creating strategy
BSENISO17638-2016焊缝的无损检验.磁粒子检验

BSENISO17638-2016焊缝的⽆损检验.磁粒⼦检验EUROPEAN STANDARD NORME EUROPéENNE EUROP?ISCHE NORM EN ISO 17638 November 2016ICS 25.160.40 Supersedes EN ISO 17638:2009English VersionNon-destructive testing of welds - Magnetic particletesting (ISO 17638:2016)Contr?le non destructif des assemblages soudés - Magnétoscopie (ISO 17638:2016) Zerst?rungsfreie Prüfung von Schwei?verbindungen - Magnetpulverprüfung (ISO 17638:2016)This European Standard was approved by CEN on 2 October 2016.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONC O M I TéE UR O PéE N DE N O R M A L I SA T I O NE UR O P?I SC HE S KO M I T E E FüR N O R M UN GCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels2016 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 17638:2016 EBS EN ISO 17638:2016EN ISO 17638:2016 (E)3European forewordThis document (EN ISO 17638:2016) has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes” in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” the secretariat of which is held by DIN.This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2017, and conflicting national standards shall be withdrawn at the latest by May 2017.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 17638:2009.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 17638:2016 has been approved by CEN as EN ISO 17638:2016 without any modification.BS EN ISO 17638:2016ISO 17638:2016(E) Contents PageForeword (iv)1 Scope (1)2 Normative references (1)3 Terms and definitions (1)4 Safety precautions (1)5 General (1)5.1 Information required prior to testing (1)5.2 Additional pre-test information (2)5.3 Personnel qualification (2)5.4 Surface conditions and preparation (2)5.5 Magnetizing (2)5.5.1 Magnetizing equipment (2)5.5.2 Verification of magnetization (3)5.6 Application techniques (3)5.6.1 Field directions and testing area (3)5.6.2 Typical magnetic testing techniques (6)5.7 Detection media (9)5.7.1 General (9)5.7.2 Verification of detection media performance (9)5.8 Viewing conditions (10)5.9 Application of detection media (10)5.10 Overall performance test (10)5.11 False indications (10)5.12 Recording of indications (10)5.13 Demagnetization (11)5.14 Test report (11)Annex A (informative) Variables affecting the sensitivity of magnetic particle testing (13)Bibliography (15)ISO 2016 – All rights reserved iiiBS EN ISO 17638:2016ISO 17638:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see /doc/b748db97f68a6529647d27284b73f242326c3101.html /directives). Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see/doc/b748db97f68a6529647d27284b73f242326c3101.html /patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL:/doc/b748db97f68a6529647d27284b73f242326c3101.html /iso/foreword.html. The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee 5, Testing and inspection of welds.This second edition cancels and replaces the first edition (ISO 17638:2003), which has been technically revised.Requests for official interpretations of any aspect of this document should be directed to the Secretariat of ISO/TC 44/SC 5 via your national standards body. A complete listing of these bodies can be found at /doc/b748db97f68a6529647d27284b73f242326c3101.html .ISO 2016 – All rights reservedBS EN ISO 17638:2016 INTERNATIONAL STANDARD ISO 17638:2016(E)Non-destructive testing of welds — Magnetic particle testing1 ScopeThis document specifies techniques for detection of surface imperfections in welds in ferromagnetic materials, including the heat affected zones, by means of magnetic particle testing. The techniques are suitable for most welding processes and joint configurations. Variations in the basic techniques that will provide a higher or lower test sensitivity are described in Annex A.This document does not specify acceptance levels of the indications. Further information on acceptance levels for indications may be found in ISO 23278 or in product or application standards.2 Normative referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3059, Non-destructive testing —Penetrant testing and magnetic particle testing — Viewing conditions ISO 9934-1:2015, Non-destructive testing — Magnetic particle testing — Part 1: General principles ISO 9934-2, Non-destructive testing — Magnetic particle testing — Part 2: Detection media ISO 9934-3, Non-destructive testing — Magnetic particle testing — Part 3: Equipment3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 12707 and ISO 17635 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses:— IEC Electropedia: available at /doc/b748db97f68a6529647d27284b73f242326c3101.html /— ISO Online browsing platform: available at /doc/b748db97f68a6529647d27284b73f242326c3101.html /obp4 Safety precautionsSpecial consideration shall be given to toxic, inflammable and/or volatile materials, electrical safety and unfiltered UV radiation.Magnetic particle testing often creates high magnetic fields close to the object under test and the magnetising equipment. Items sensitive to these fields should be excluded from such areas.5 General5.1 Information required prior to testingPrior to testing, the following items shall be specified (where applicable):a)specific test procedure;b)certification requirements for NDT personnel;ISO 2016 – All rights reserved 1BS EN ISO 17638:2016ISO 17638:2016(E)extent of coverage;state of manufacture;testing techniques to be used;overall performance test;any demagnetization;acceptance level;action necessary for unacceptable indications.5.2 Additional pre-test informationPrior to testing, the following additional information can also be required:type and designation of the parent and weld materials;welding process;location and extent of welds to be tested;joint preparation and dimensions;location and extent of any repairs;post-weld treatment (if any);surface conditions.Operators may ask for further information that could be helpful in determining the nature of any indications detected.5.3 Personnel qualificationMagnetic particle testing of welds and the evaluation of results for final acceptance shall be performed by qualified and capable personnel. It is recommended that personnel be qualified in accordance with ISO 9712 or an equivalent standard at an appropriate level in the relevant industry sector.5.4 Surface conditions and preparationAreas to be tested shall be dry unless appropriate products for wet surfaces are used. It may be necessary to improve the surface condition, e.g. by use of abrasive paper or local grinding to permit accurate interpretation of indications.Any cleaning or surface preparation shall not be detrimental to the material, the surface finish or the magnetic testing media. Detection media shall be used within the temperature range limitations set by the manufacturer.5.5 Magnetizing5.5.1 Magnetizing equipmentGeneral magnetization requirements shall be in accordance with ISO 9934-1:2015, Clause 8. Unless otherwise specified, for example, in an application standard, the following types of alternating current-magnetizing equipment shall be used: electromagnetic yokes;ISO 2016 – All rights reservedBS EN ISO 17638:2016ISO 17638:2016(E)b)current flow equipment with prods;c)adjacent or threading conductors or coil techniques.DC electromagnets and permanent magnets may only be used by agreement at the time of enquiry and order.The magnetizing equipment shall conform to ISO 9934-3.Where prods are used, precautions shall be taken to minimize overheating, burning or arcing at the contact tips. Removal of arc burns shall be carried out where necessary. The affected area shall be tested by a suitable method to ensure the integrity of the surface.5.5.2 Verification of magnetizationFor the verification of magnetization, see ISO 9934-1:2015, 8.2.For structural steels in welds, a tangential field between 2 kA/m to 6 kA/m (r.m.s.) is recommended. The adequacy of the surface flux density shall be established by one or more of the following methods: a)by testing a representative component containing fine natural or artificial discontinuities in the least favourable locations;b)measurement of the tangential field strength as close as possible to the surface using a Hall effect probe; the appropriate tangential field strength can be difficult to measure close to abrupt changes in the shape of a component or where flux leaves the surface of a component;c)calculation of the approximate current value in order to achieve the recommended tangential field strength; the calculation can be based on the current values specified in Figure 5 and Figure 6;d)by the use of other methods based on established principles.Flux indicators (i.e. shim-type) placed in contact with the surface under test provide a guide to the magnitude and direction of the tangential field strength, but should not be used to verify that the tangential field strength is acceptable.NOTE Information on b) is given in ISO 9934-3.5.6 Application techniques5.6.1 Field directions and testing areaThe detectability of an imperfection depends on the angle of its major axis with respect to the direction of the magnetic field. This is explained for one direction of magnetization in Figure 1.ISO 2016 – All rights reserved 3BS EN ISO 17638:2016ISO 17638:2016(E)Keymagnetic field direction αangle between the magnetic field and the direction of the imperfection optimum sensitivity αmin minimum angle for imperfection detection reducing sensitivity αi example of imperfection orientationinsufficient sensitivityFigure 1 — Directions of detectable imperfectionsTo ensure detection of imperfections in all orientations, the welds shall be magnetized in two directionsapproximately perpendicular to each other with a maximum deviation of 30°. This can be achieved using one or more magnetization methods.Testing in only one field direction is not recommended but may be carried out if specified, for example, in an application standard.When using yokes or prods, there will be an area of the component in the vicinity of each pole piece or tip that will be impossible to test due to excessive magnetic field strength. This is usually seen as furring of particles.Care shall be taken to ensure adequate overlap of the testing areas as shown in Figure 2 and Figure 3.ISO 2016 – All rights reservedBS EN ISO 17638:2016ISO 17638:2016(E)Dimensions in millimetresKeyd separation between the poles (yoke/prod )Figure 2 — Examples of effective testing area (shaded) for magnetizing with yokes and prods ? ISO 2016 – All rights reserved 5BS EN ISO 17638:2016ISO 17638:2016(E)Keyeffective area overlapFigure 3 — Overlap of effective areas5.6.2 Typical magnetic testing techniquesMagnetic particle testing techniques for common weld joint configurations are shown in Figure 4, Figure 5 and Figure 6. Values are given for guidance purposes only. Where possible, the same directions of magnetization and field overlaps should be used for other weld geometries to be tested. The width of the flux current (in case of flux current technique) or of the magnetic flow (in case of magnetic flow technique) path in the material, d , shall be greater than or equal to the width of the weld and the heat affected zone +50 mm and in all cases, the weld and the heat affected zone shall be included in the effective area. The direction of magnetization with respect to the orientation of the weld shall be specified.ISO 2016 – All rights reservedBS EN ISO 17638:2016 ISO 17638:2016(E)Dimensions in millimetresd ≥ 75b ≤ d/2β≈ 90od1 ≥ 75b1 ≤ d1/2b2 ≤ d2 – 50d2≥ 75d1 ≥ 75d2 ≥ 75b1 ≤ d1/2b2 ≤ d2 ? 50d1 ≥ 75d2 > 75b1 ≤ d1/2b2 ≤ d2 ? 50Key1longitudinal cracks2transverse cracksFigure 4 — Typical magnetizing techniques for yokes ISO 2016 – All rights reserved 7BS EN ISO 17638:2016 ISO 17638:2016(E)Dimensions in millimetresd ≥ 75b ≤ d/2β≈ 90od ≥ 75b ≤ d/2d ≥ 75b ≤ d/2d ≥ 75b ≤ d/2Figure 5 — Typical magnetizing techniques for prods, using a magnetizing current prod spacing ISO 2016 – All rights reservedBS EN ISO 17638:2016ISO 17638:2016(E)Dimensions in millimetres20 ≤ a ≤ 50 N ·I ≥ 8D 20 ≤ a ≤ 50 N ·I ≥ 8D20 ≤ a ≤ 50 N ·I ≥ 8DKeyN number of turns I current (r.m.s)a distance between weld and coil or cableFigure 6 — Typical magnetizing techniques for flexible cables or coils (for longitudinal cracks)5.7 Detection media5.7.1 GeneralDetection media may be either in dry powder form or magnetic inks in accordance with ISO 9934-2.5.7.2 Verification of detection media performanceThe detection media used shall fulfil the requirements of ISO 9934-2.ISO 2016 – All rights reserved9BS EN ISO 17638:2016ISO 17638:2016(E)Indications obtained with the medium to be verified shall be compared against those obtained from a medium having a known and acceptable performance. For this purpose, the reference indications may be real imperfections,photograph(s), andreplica(s).5.8 Viewing conditionsThe viewing conditions shall be in accordance with ISO 3059.5.9 Application of detection mediaAfter the object has been prepared for testing, the detection medium shall be applied by spraying, flooding or dusting immediately prior to and during the magnetization. Following this, time shall be allowed for indications to form before removal of the magnetic field.When magnetic suspensions are used, the magnetic field shall be maintained within the object until the majority of the suspension carrier liquid has drained away from the test surface. This will prevent any indications being washed away.Depending on the material being tested, its surface condition and magnetic permeability, indications will normally remain on the surface even after removal of the magnetic field due to residual magnetism within the part (mainly at the location of the poles). However, the presence of residual magnetism shall not be presumed and post evaluation techniques after removal of the prime magnetic field source are only permitted when a component has been proven by an overall performance test to retain magnetic indications.5.10 Overall performance testWhen specified, an overall performance test of the system sensitivity for each procedure shall be carried out on site. The performance test shall be designed to ensure a proper functioning of the entire chain of parameters including the equipment, the magnetic field strength and direction, surface characteristics, detection media and illumination.The most reliable test is to use representative test pieces containing real imperfections of known type, location, size and size-distribution. Where these are not available, fabricated test pieces with artificial imperfections or flux shunting indicators of the cross or disc or shim-type may be used.The test pieces shall be demagnetized and free from indications resulting from previous tests.NOTE It can be necessary to perform an overall performance test of the system sensitivity for each specific procedure on site.5.11 False indicationsFalse indications which may mask relevant indications can arise for many reasons, such as changes in magnetic permeability, very important geometry variation in, for example, the heat affected zone. Where masking is suspected, the test surface shall be dressed or alternative test methods should be used.5.12 Recording of indicationsIndications can be recorded in one or more of the following ways by using: description in writing;sketches;10 ? ISO 2016 – All rights reservedBS EN ISO 17638:2016ISO 17638:2016(E)c)photography;d)transparent adhesive tape;e)transparent varnish for “freezing” the indication on the surface tested;f)peelable contrast coating;g)video recording;h)magnetic particle dispersion in an epoxy curable resin;i)magnetic tapes;j)electronic scanning.5.13 DemagnetizationAfter testing welds with alternating current, residual magnetization will normally be low and there will generally be no need for demagnetization of the object under test. If demagnetization is required, it shall be carried out using a defined method and to a predefined level. For metal cutting processes, a typical residual field strength value of H < 0,4 kA/m is recommended.5.14 Test reportA test report shall be prepared.The report should contain at least the following:a)name of the company carrying out the test;b)the object tested;c)date of testing;d)parent and weld materials;e)any post weld heat treatment;f)type of joint;g)material thickness;h)welding process(es);i)temperature of the test object and the detection media (when using media in circulation) throughout testing duration;j)identity of the test procedure and description of the parameters used, including the following:— type of magnetization;— type of current;— detection media;— viewing conditions;k)details and results of the overall performance test, where applicable;l)acceptance levels;ISO 2016 – All rights reserved 11BS EN ISO 17638:2016ISO 17638:2016(E)m)description and location of all recordable indications;test results with reference to acceptance levels;names, relevant qualification and signatures of personnel who carried out the test.12 ? ISO 2016 – All rights reservedBS EN ISO 17638:2016ISO 17638:2016(E)Annex A(informative)Variables affecting the sensitivity of magnetic particle testingA.1 Surface conditions and preparationThe maximum test sensitivity that can be achieved by any magnetic testing method is dependent on many variables but can be seriously affected by the surface roughness of the object and any irregularities present. In some cases, it can be necessary to— dress undercut and surface irregularities by grinding, and— remove or reduce the weld reinforcement.Surfaces covered with a thin non-ferromagnetic coatings up to 50 µm thickness may be tested provided the colour is contrasting with the colour of the detection medium used. Above this thickness, the sensitivity of the method decreases and may be demonstrated to be sufficiently sensitive before proceeding with the test.A.2 Magnetizing equipment characteristicsThe use of alternating current gives the best sensitivity for detecting surface imperfections. Yokes produce an adequate magnetic field in simple butt-welds but where the flux is reduced by gaps or the path is excessive through the object, as in T-joints a reduction of sensitivity can occur.For complex joint configurations, i.e. branch connections with an inclined angle of less than 90°, testing using yokes might be inadequate. Prods or cable wrapping with current flow will, in these cases, prove more suitable.A.3 Magnetic field strength and permeabilityThe field strength required to produce an indication strong enough to be detected during magnetic particle testing is dependent mainly on the magnetic permeability of the object. Generally, magnetic permeability is high in softer magnetic materials, for example, low alloy steels and low in harder magnetic materials, i.e. martensitic steels. Because permeability is a function of the magnetizing current, low permeability materials usually require application of a higher magnetization value than do softer alloys to produce the same flux density. It is essential, therefore, to establish that flux density values are adequate before beginning the magnetic particle testing.A.4 Detection mediaMagnetic particle suspensions will usually give a higher sensitivity for detecting surface imperfections than dry powders.Fluorescent magnetic detection media usually give a higher test sensitivity than colour contrast media, because of the higher contrast between the darkened background and the fluorescent indication. The sensitivity of the fluorescent method will, nevertheless, decrease in proportion to any increase in the roughness of the surface to which magnetic particles adhere and can cause a disturbing background fluorescence.ISO 2016 – All rights reserved 13BS EN ISO 17638:2016ISO 17638:2016(E)Where the background illumination cannot be adequately lowered or where background fluorescence is disturbing, coloured detection media in conjunction with the smoothing effect of a contrast aid will usually give better sensitivity.14 ? ISO 2016 – All rights reservedBS EN ISO 17638:2016ISO 17638:2016(E)Bibliography[1] ISO 9712, Non-destructive testing — Qualification and certification of NDT personnel[2] ISO 12707, Non-destructive testing — Magnetic particle testing — Vocabulary[3] ISO 17635, Non-destructive testing of welds — General rules for metallic materials[4] ISO 23278, Non-destructive testing of welds — Magnetic particle testing — Acceptance levels ? ISO 2016 – All rights reserved 15。
美国船级社(ABS)无损检测标准

3.4射线探伤位置 在选择探伤部位时应着重强调下列区域: 高应力区的焊缝、其它重要的结构、使用中无法接近或难以检验的焊缝、合拢焊缝、怀疑有问题的区
域。 a) 水面船舶,船舯0.6L范围内的射线检验应主要在舷顶列板、舭列板、甲板纵桁、龙骨板的对接焊缝
ABS 无损检测指南
一. 概述
1. 检验准备 一个直观的检验操作要使验船师满意;清理焊缝的方法和无损检测程序也要使验船师满意。
3.监测方法 要用认可的无损检测方法去检查焊缝,例如射线检测(RT)、超声波检测(UT)、磁粉检测(MT)、 着色检测(PT)。射线和超声波检测均可用于内部(表层下)检测。磁粉和着色检测或其它等效 认可的方法一般用于焊缝的表层检测。检测的范围、位置和检测方法的选择主要根据入级规范、 焊接所用的材料和程序以及质量控制程序。检测结果要是验船师满意。
5.9 无损检验证书 3 级 5.9.1 具有 3 级证书的无损检测人员可以指导下列任何无损检测方法的操作: I)对所有检测工具和人员负责 II)确定检测技术和程序 III)解释无损检测规则、标准、技术说明书和程序 IV)为特殊的无损检测选定特定的检测技术和程序 V)根据现有无损检测规则、标准、技术说明书对检测结果进行解释和评估 VI) 管理资格证书的考试(假如认证机构赋予此项权利) VII)执行或指导所有 1 级和 2 级人员的职责 5.9.2 3 级无损检测人员应该: I) 在应用材料、装配、生产工艺方面具有深厚的造诣,以利于选择检测方法、创立 和帮助创立可接受的检测技术 II) 总体上通晓其它检测方法 III) 具有培训和指导低于 3 级人员的能力
5.7 无损检验证书 2 级 具有 2 级证书的无损检测人员可以根据既定的检测程序执行或指导无损检测,包括: I) 确认 2 级人员所选用检测方法的限度 II) 根据实际工作情况,把无损检测规则、标准、技术说明书和程序翻译成检验指导书 III) 装配和教验检测设备 IV) 执行和指导检测 V) 根据可用的无损检测规则、标准、技术说明书对结果进行解释和评估 VI) 准备无损检测指导书 VII) 执行或指导所有 1 级人员的职责 VIII) 培训和指导低于 2 级证书的人员 IX) 组织和报告无损检测结果
USP-1092-溶出度试验的开发和验证(中英文对照版)之欧阳地创编

(1092)溶出度试验的开发和验证【中英文对照版】INTRODUCTION前言Purpose目的The Dissolution Procedure: Developmentand Validation <1092> provides a comprehensive approach covering items to considerfor developing and validating dissolution procedures and the accompanyinganalytical procedures. It addresses the use of automation throughout the testand provides guidance and criteria for validation. It also addresses thetreatment of the data generated and the interpretation of acceptance criteriafor immediate and modifiedrelease solid oral dosage forms.溶出实验:开发和验证(1092)指导原则提供了在溶出度方法开发和验证过程中以及采用相应分析方法时需要考虑的因素。
本指导原则贯穿溶出度实验的全部过程,并对方法提供了指导和验证标准。
同时它还涉及对普通制剂和缓释制剂所生成的数据和接受标准进行说明。
Scope范围Chapter <1092> addresses the development andvalidation of dissolution procedures, with a focus on solid oral dosage forms.Many of the concepts presented, however, may be applicable to other dosageforms and routes of administration. General recommendations are given with theunderstanding that modifications of the apparatus and procedures as given in USPgeneral chapters need to be justified.<1092>章节讨论了溶出度实验的开发和验证,重点是口服固体制剂。
托福阅读TPO5-3 The Cambrian Explosion

The Cambrian ExplosionThe geologic timescale is marked by significant geologic and biological events, including the origin of Earth about 4.6 billion years ago, the origin of life about 3.5 billion years ago, the origin of eukaryotic life-forms (living things that have cells with true nuclei) about 1.5 billion years ago, and the origin of animals about 0.6 billion years ago. The last event marks the beginning of the Cambrian period. Animals originated relatively late in the history of Earth—in only the last 10 percent of Earth’s history. During a geologically brief 100-million-year period, all modern animal groups (along with other animals that are now extinct) evolved. This rapid origin and diversification of animals is often referred to as “the Cambrian explosion.”Scientists have asked important questions about this explosion for more than a century. Why did it occur so late in the history of Earth? The origin of multicellular forms of life seems a relatively simple step compared to the origin of life itself. Why does the fossil record not document the series of evolutionary changes during the evolution of animals? Why did animal life evolve so quickly? Paleontologists continue to search the fossil record for answers to these questions.One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft bodied and simply did not fossilize. Fossilization of soft-bodied animals is less likely than fossilization of hard-bodied animals, but it does occur. Conditions that promote fossilization of soft-bodied animals include very rapid covering by sediments that create an environment that discourages decomposition. In fact, fossil beds containing soft-bodied animals have been known for many years.The Ediacara fossil formation, which contains the oldest known animal fossils, consists exclusively of soft-bodied forms. Although named after a site in Australia, the Ediacara formation is worldwide in distribution and dates to Precambrian times. This 700-million-year-old formation gives few clues to the origins of modern animals, however, because paleontologists believe it represents an evolutionary experiment that failed. It contains no ancestors of modern animal groups.A slightly younger fossil formation containing animal remains is the Tommotian formation, named after a locale in Russia. It dates to the very early Cambrian period, and it also contains only soft-bodied forms. At one time, the animals present in these fossil beds were assigned to various modern animal groups, but most paleontologists now agree that all Tommotian fossils represent unique body forms that arose in the early Cambrian period and disappeared before the end of the period, leaving no descendants in modern animal groups.A third fossil formation containing both soft-bodied and hard-bodied animals provides evidence of the result of the Cambrian explosion. This fossil formation, called the Burgess Shale, is in Yoho National Park in the Canadian Rocky Mountains of British Columbia. Shortly after the Cambrian explosion, mud slides rapidly buried thousands of marine animals under conditions that favored fossilization. These fossil beds provideevidence of about 32 modern animal groups, plus about 20 other animal body forms that are so different from any modern animals that they cannot be assigned to any one of the modern groups. These unassignable animals include a large swimming predator called Anomalocaris and a soft-bodied animal called Wiwaxia, which ate detritus or algae. The Burgess Shale formation also has fossils of many extinct representatives of modern animal groups. For example, a well-known Burgess Shale animal called Sidneyia is a representative of a previously unknown group of arthropods (a category of animals that includes insects, spiders, mites, and crabs).Fossil formations like the Burgess Shale show that evolution cannot always be thought of as a slow progression. The Cambrian explosion involved rapid evolutionary diversification, followed by the extinction of many unique animals. Why was this evolution so rapid? No one really knows. Many zoologists believe that it was because so many ecological niches were available with virtually no competition from existing species. Will zoologists ever know the evolutionary sequences in the Cambrian explosion? Perhaps another ancient fossil bed of soft-bodied animals from 600-million-year-old seas is awaiting discovery.the origin of Earth about 4.6 billion years ago, the origin of life about 3.5 billion years ago, the origin of eukaryotic life-forms (living things that have cells with true nuclei) about 1.5 billion years ago, and the origin of animals about 0.6 billion years ago. The last event marks the beginning of the Cambrian period. Animalslate in the history of Earth—in only the last 10 percent of Earth’s history. During aof animals is often referred to as “the Cambrian explosion.”passage is closest in meaning to○ numerous○ important○ unexplained○ sudden○ surprisingly○ collectively○ comparatively○ characteristicallythe passage is closest in meaning to○ emergence of many varieties○ steady decline in number○ gradual increase in body size○ sudden disappearanceWhy did it occur so late in the history of Earth? The origin of multicellular forms of life seems a relatively simple step compared to the origin of life itself. Why does the fossil record not document the series of evolutionary changes during the evolution of animals? Why did animal life evolve so quickly? Paleontologists continue to search the fossil record for answers to these questions.○ occurred 0.6 billion years ago,late in Earth’s history○ was characterized by the unusually fast evolution of many new life-forms○ was characterized by widespread animal extinction○ was characterized by violent volcanic eruptions5. According to Paragraph2, which of the following is NOT a question that paleontologists asked about the Cambrian explosion?○ Why was the origin of life a simple step in Earth’s history?○ Why did it take so long for multicellular organisms to develop?○ Why did animal life evolve so rapidly?○ Why do es the fossil record lack evidence of animal evolution during that time?6. Which of the following best describes the relationship between paragraph 2 and paragraph 3?○ Paragraph 2 puts forward several scientific claims, one of which is rejected in p aragraph 3.○ Paragraph 2 poses several questions, and paragraph 3 offers a possible answer to one of them.○ Paragraph 2 presents outdated traditional views, while paragraph 3 presents the current scientific conclusions.○ Paragraph 2 introduces a general ization that is illustrated by specific examples in paragraph 3.Paragraph 3: One interpretation regarding the absence of fossils during this important 100-million-year period is that early animals were soft-bodied and simply did not fossilize. Fossilization of soft-bodied animalsof soft-bodied animals include very rapid covering by sediments that create an environment that discourages decomposition. In fact, fossil beds containing soft-bodied animals have been known for many years.○ complicate○ prevent○ encourage○ affectParagraph 4: The Ediacara fossil formation, which contains the oldest known animal fossils, consists exclusively of soft-bodied forms. Although named after a site in Australia, the Ediacara formation is worldwide in distribution and dates to Precambrian times. This 700-million-year-old formation gives few clues to the origins of modern animals, however, because paleontologists believe it represents an evolutionary experiment that failed. It contains no ancestors of modern animal groups.8. Which of the following is NOT mentioned in paragraph 4 as being true of the Ediacara formation?○ It contains fossils that date back to the Precambrian period.○ It contains only soft-bodied animal fossils.○ It is located on a single site in Australia.○ It does not contain any fossils of the ancestors of modern an imals.Paragraph 5: A slightly younger fossil formation containing animal remains is the Tommotian formation,the passage? Incorrect choices change the meaning in important ways or leave out essential information.○ The animals found in the Tommotian fossil bed were once thought to belong to a variety of modern animal groups, but now they are thought to have descended from a single group.○ Animals in the Tommotian fossil beds were initially assigned to modern an imal groups but are now thought to belong to groups that emerged and died out during the Cambrian period.○ Though at first they thought otherwise, paleontologists now agree that the animals in the Tommotian have body forms from which modern animals have descended.○ It is unclear whether the Tommotian fossils from the early Cambrian period represent unique body forms or whether they should be assigned to various modern animal groups.Paragraph 6: A third fossil formation containing both soft-bodied and hard-bodied animals provides evidence of the result of the Cambrian explosion. This fossil formation, called the Burgess Shale, is in Yoho National Park in the Canadian Rocky Mountains of British Columbia. Shortly after the Cambrian explosion, mud slides rapidly buried thousands of marine animals under conditions that favored fossilization. These fossil beds provide evidence of about 32 modern animal groups, plus about 20 other animal body forms that are so different from any modern animals that they cannot be assigned to any one of the modern groups. Theseate detritus or algae. The Burgess Shale formation also has fossils of many extinctis a representative of a previously unknown group of arthropods (a category of animals that includes insects,spiders, mites, and crabs).10. Why does○ To contrast predators with animals that eat plants such as algae○ To question the effects of rapid mud slides on fossilization○ To suggest that much is still unknown about animals found in the Burgess Shale○ To provide examples of fossils that cannot be assigned to a modern animal group○ a relative of Anomalocaris and Wiwaxia○ a previously unknown Burgess Shale animal○ an extinct member of a currently existing category of animals○ an animal that cannot be assigned to any modern animal groupParagraph 7: Fossil formations like the Burgess Shale show that evolution cannot always be thought of as a slow progression. The Cambrian explosion involved rapid evolutionary diversification, followed by the extinction of many unique animals. Why was this evolution so rapid? No one really knows. Many zoologists believe that it was because so many ecological niches were available with virtually no competition from existing species. Will zoologists ever know the evolutionary sequences in the Cambrian explosion? Perhaps another ancient fossil bed of soft-bodied animals from 600-million-year-old seas is awaiting discovery.12. What can be inferred from paragraph 7 about why the Cambrian explosion is so unusual?○ It generated new ecological niches through the extinction of many unique animals.○ It was a period of rapid evolution, and evolution is often thought of as a slow process.○ It is a period whose evolutionary sequences are clearly marked.○ It generated a very large number of ancient fossil beds containing soft-bodied animals.Paragraph 3: One interpretation regarding the absence of fossils during this important 100-million-year period is t hat early animals were soft bodied and simply did not fossilize. ■Fossilization of soft-bodied animals is less likely than fossilization of hard-bodied animals, but it does occur. ■Conditions that promote fossilization of soft-bodied animals include very rapid covering by sediments that create an environment that discourages decomposition. ■In fact, fossil beds containing soft-bodied animals have been known for many years. ■13. Look at the four squares [■] that indicate where the following sentence could be added to the passage.It is relatively rare because the fossilization of soft-bodied animals requires a special environment.Where could the sentence best fit?14. Directions: An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selecting the THREE answer choices that express the most important ideas in the passage. Some answer choices do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage. This question is worth 2 points.The term “Cambrian explosion” refers to the geologically brief period during which all modern animal groups evolved.●●●Answer Choices○Little is known about the stages of evolution during the Cambrian period, in part because early animals were soft bodied and could fossilize only under particular conditions.○While animal fossils from before the Cambrian explosion have no modern descendants, many animals that evolved during the Cambrian explosion can be assigned to modern groups.○The Cambrian period is significant because it marks the emergence of eukaryotic life-forms—organisms that have cells with true nuclei.○The Ediacara fossil formation provides the most information about the Cambrian explosion, while the earlier, Tommotian and Burgess Shale formations give clues about Precambrian evolution.○Zoologists are awaiting the discovery of a 600-million-year-old fossil formation in order to be able to form a theory of how animal evolution progressed.○Although the reasons for the rapid evolution of animals during the Cambrian period are not known, one proposed explanation is an abundance of niches with a lack of competitors.参考答案:1. ○22. ○33. ○14. ○25. ○16. ○27. ○38. ○39. ○210. ○411. ○312. ○213. ○214. Little is known about the…While animal fossils…Although the reasons for the…。
SBL模拟考试答卷

2019 ACCA Job Hunting Competition National FinalCase study scenario and tasksUtopiaIntroductionUtopia Company is a listed company which operates major theme park complexes around the world. The company’s theme parks are named ‘Utopia’.Utopia’s corporate headquarters are located beside their first theme park complex in a country in Western Europe.Exhibits 1 - 4 provide information relevant to Utopia Company.Exhibit 1: Extracts from a report on Utopia Company produced recently by a management consultant as part of a strategic review.Exhibit 2: A transcript of a recent telephone conversation between yourself and Moeen Hasan, Utopia Company’s CEO, regarding a possible new ride. The Exhibit also includes a related email message.Exhibit 3: An extract from the minutes of a recent Utopia Company board meeting discussing the possibility of Utopia developing and operating hotels.Exhibit 4: A n email message from Utopia Company’s Finance Director and your line manager, Tara Adenowo regarding the resignation of a director of Utopia Company.The case requirements are included in the tasks which follow:1.Tara Adenowo (Finance Director) has sent you a report produced recently by an externalmanagement consultant. The report is shown in Exhibit 1. Tara is required to present keyfindings from the report at the next Utopia Company board meeting.Required:Prepare information for four presentation slides to be presented to the Utopia Company board, including relevant bullet points and supporting notes. The information presented in the slides should use a recognised model to analyse Utopia’s strategic position.(28 marks)Two professional skills marks are available for demonstrating analysis skills, business acumen and communication skills when analysing and communicating the company’s strategic position.(2 marks)(30 marks) 2.During a period of annual leave for your line manager Tara Adenowo (Finance Director), youreceived an email from the Utopia Company CEO Moeen Hasan.The email, and the attachments sent with it, are shown in Exhibit 2.Required:Prepare working notes for Moeen which evaluate:(a) The strategic advantages and disadvantages of proceeding with the introduction of theGalaxy Warrior ride. (8 marks)(b) The likely implications of proceeding with the project on employees and shareholders(internal stakeholders), and customers and governments (external stakeholders).(12 marks)Professional skills marks are available across parts (a) and (b) for demonstrating analyticalskills and commercial acumen skills in evaluating whether the ride fits with the company’sstrategy and explaining the likely impact on stakeholders. (2 marks)(c) Two key factors to consider when deciding which park the first Galaxy Warrior rideshould be built in. (6 marks)Professional skills marks are available for demonstrating commercial acumen and scepticism skills in identifying and explaining factors to consider. (2 marks)(30 marks)3.The idea of Utopia Company opening hotels on Utopia sites was raised at a recent boardmeeting. An extract from the meeting minutes is shown in Exhibit 3.Since the board meeting Moeen Hasan (CEO) has been in touch with Tara Adenowo andrequested a report covering different aspects of the proposed diversification into hoteldevelopment and operation.Moeen has asked for the report to be produced to evaluate the strategic option of UtopiaCompany developing and subsequently operating one Utopia hotel on each of the Utopiaparks.Tara has asked for your assistance in drafting sections of the report.Required:Draft sections of the report to evaluate:(a) Whether the development and operation of hotels would be a good strategic fit forUtopia Company including identifying the key risks associated with this strategy.(8 marks)Professional Skills marks are available for demonstrating evaluation skills and businessacumen in selecting key points to include in the report and for providing clear supporting notes.(2 marks)(b) Issues to consider when deciding how the new area of operation should beincorporated into the Utopia Company structure. (8 marks)Professional Skills marks are available for displaying analysis skills and business acumenwhen considering how to add the new operation into the company structure. (2 marks)(20 marks)4.You have received an email message from Utopia Company’s Finance Director and your linemanager, Tara Adenowo. T ara’s email message is shown in Exhibit 4.Required:Prepare a briefing paper for Tara Adenowo which:(a) Evaluates the performance of Utopia Company’s remuneration committee in agreeingDipa Malik's reward package. (6 marks)Professional skills marks are available for demonstrating evaluation skills and commercialacumen in evaluating the performance of the remuneration committee. (2 marks)and(b) Describes an appropriately designed and balanced reward package that could be usedto attract a new director to replace Dipa Malik. (10 marks)Professional skills marks are available for demonstrating commercial acumen skills whendesigning an appropriate reward package. (2 marks)(20 marks)Exhibit 1A report summarising the findings of a strategic review completed recently by an external management consultant.To: The Board of Directors - Utopia CompanySubject: Strategic review - Utopia CompanyFrom: Nadia Ake (Management consultant)Date: xx xx xxxxIntroductionThis report is based on information obtained from research of the theme park industry and from the executive directors of Utopia Company.Organisational overviewUtopia Company is a listed company which operates major theme park complexes around the world. The company’s theme parks are named ‘Utopia’.The company’s first theme park complex opened in 1987, in Western Europe. The company’s second park, in North America, opened in 1998. The third complex opened in Asia in 2008. Construction of a fourth park, in the Middle East, is well advanced. The park is scheduled to open in 14 months.Utopia’s corporate headquarters are located beside their first theme park complex in a country in Western Europe. The current Chief Executive Officer (CEO) is Moeen Hasan, who has been at Utopia Company for 10 years and CEO for 5 years.Business modelUtopia’s site selection and park development process follows the template established with Utopia’s first park:∙Find an appropriately located but relatively cheap site∙Construct the park∙Encourage the growth of a supporting infrastructure including transport links and accommodationEach park complex has large car parks, including space for busses and coaches, and a nearby railway station.Each park includes three distinct zones:∙Junior-U, with rides and attractions intended to appeal to families with young children.∙Thrill-U, in which the major attractions are rides intended to thrill. Many of these rides are subject to height restrictions, although the vast majority of 12-13 year old children exceed the minimum height.∙Ocean-U, which has a marine theme including rides, play activities and the Ocean-U Arena in which trained dolphins perform with human trainers.Utopia Company employ experts in engineering and design to develop new attractions. Each park is in a constant process of evolution, with new concepts being tested and implemented.All parks have a monorail system that links the car parks, bus and railway stations to the park’s main gate.Visitors to all three established parks are a mixture of day trippers and those who stay overnight in the vicinity of the park, staying in hotels owned and operated by other companies as Utopia do not operate their own hotels.Utopia Company’s main sources of revenue are entry tickets, merchandise sold at retail outlets in the parks and food sold at the park’s catering outlets. All rides and attractions are covered by the cost of the entry ticket. Tickets are sold both online and at each park’s main gate. Tickets sold online are offered at a 5% discount, to encourage advance purchase.There are two categories of tickets. Standard tickets include access to all park areas, shows and attractions but exclude admission to the rides in the Thrill-U area of the park. Premium tickets include access to all park areas, shows and attractions and also include admission to the rides in the Thrill-U area of the park. Premium tickets are 30% more expensive than standard tickets and are most popular among visitors aged 14 - 30.The company aims to offer a consistent customer experience across all locations.Strategic directionUtopia has deliberately expanded capacity gradually, with a new park opening approximately every 10 years. It is feasible to build parks at a faster rate, but the board feels this would risk saturating the market and diluting the appeal and publicity associated with the opening of a new park.Moeen Hasan encourages the board to see Utopia’s core product as ‘an escape from the routine of daily life’. A trip to Utopia must be seen as something special, an experience that will live in the minds of visitors long after they have left the park gates.Visitors to Utopia parks have shown they are prepared to travel considerable distances and the relative scarcity of parks seems to be part of the attraction.Utopia monitor the popularity of individual rides, shows and other attractions by measuring capacity utilisation and customer queue waiting time, and from customer feedback. Attractions which experience a significant drop in popularity are upgraded, adapted or replaced.The rides, shows and other attractions offered are consistent across all Utopia parks which enables the company to provide the same experience regardless of park location.Utopia work closely with other stakeholders to make visiting each park as convenient as possible. For example, the company has successfully negotiated changes to railway timetables so that‘express’ trains from major cities stop at Utopia park railway stations.Recent visitor numbers and key financial indicatorsOver the past two years Utopia Company has experienced an average annual increase in visitor numbers of 6%, an average annual increase in revenue of 5.5% and an average increase in operating profit of 4%.Utopia Company: Total visitor numbers (millions)Most recent year PreviousyearTwoyears agoAge 9 and below 2.44 2.50 2.53 Age 10-16 1.80 1.80 1.76 Age 17–21 1.90 1.81 1.57 Age 22–30 2.45 2.31 2.10 Age 31–45 3.81 3.65 3.38 Age 46–59 1.62 1.44 1.29 Age 60 and above 1.15 0.94 0.87 Total 15.17 14.45 13.50Revenue and operating profitMost recent year€ million Previous year€ millionTwo years ago€ millionRevenue 2,122 2,050 1,925Operating profit 827 795 765Operating profit as a % of revenueMost recent year Previous year Two years ago39% 39% 40%Average revenue per visitorMost recent year Previous year Two years ago€139.88 €141.87 €142.59The steady growth in revenue and operating profit has been achieved against a backdrop of steady economic growth globally.In percentage terms, Utopia’s revenue growth is slightly behind the growth in visitor numbers. Utopia’s board attribute this to a change in the sales mix between standard tickets and premium tickets.In terms of visitor number growth, Utopia has either matched or outperformed each of the major players in th e global theme park market over this period. Utopia’s popularity is attributed to their ability to regularly release new rides and features across the three areas of their parks.Although Utopia relies upon discretionary consumer spending, senior management feel the company is positioned to perform well regardless of economic conditions. During periods of economic growth the proportion of Utopia visitors comprising international and domestic tourists increases. During times when economic conditions are more difficult, parks attract a higher proportion of local visitors who are economising by holidaying closer to home.The board see Utopia’s future as secure and prosperous as long as people wish to relax and enjoy themselves.Other points of interest from the consultant’s reportThe theme park market is competitive with customers always looking for new experiences. New rides often require significant capital expenditure but also generate significant media interest and provide a focus for advertising campaigns.The weather significantly affects attendance at parks. Poor weather, particularly rain, has been found to reduce attendance on a given day by up to 40%. Utopia are exploring possibilities for covering parks so they are not affected by the weather.Health and safety is a high priority. All safety harnesses are checked multiple times per day and the mechanical aspects of rides are checked weekly by Utopia engineers. However, there is always the risk that accidents can occur which could be serious. Utopia are fully insured.Around 50% of Utopia workers are members of trade unions. The involvement of unions tends to ensure that all companies in the industry pay similar rates.Parks are open 365 days a year, which means that essential maintenance has to happen during scheduled attraction closures which are published a few months in advance.Demand fluctuates significantly at each park across the year. Week days during winter months, outside of school holidays, are particularly quiet. Pricing initiatives have been introduced in an attempt to smooth demand, with very limited success.Customer feedback indicates that Utopia staff are perceived by customers as being well trained and professional. However, customer approval ratings are significantly lower during the summer season at each park, when significant numbers of temporary staff are used.The Utopia brand enjoys high brand awareness and Utopia parks are perceived as offering a high quality experience, reflecting effective public relations and marketing. The board are keen to establish Utopia as a genuine global brand and holiday destination, which some feel requires the company to downplay its European origin and diversify outside of theme parks.Feedback from employee surveys indicate that staff morale and satisfaction ratings are generally good. Employees (and shareholders) believe Moeen Ali leads the company well.In the most recent year, 43% of Utopia visitors were over 30 years of age. The equivalent percentage ten years ago was 35%. This statistic reflects the aging population in Europe and North America. The Middle East also has an aging population.In interviews held with board members, two individuals expressed concern that the market research carried out before the new park in the Middle East was given the go-ahead was flawed, as it failed to take cultural differences into account. Both board members stated that they did not raise their concerns at board meetings as they feared being perceived as ‘negative’.There is some support at board level for a strategy of growth through diversification into the development and management of hotels.There is also support at board level to investigate the opening of a fifth park, in South America, to take advantage of a growing ‘middle-class’ in the re gion.In Europe and North America, parks have experienced some negative publicity from groups opposed to dolphins being kept in captivity and trained to perform for an audience.The emerging technology referred to as ‘Virtual Reality (VR)’ has the potentia l to be incorporated in new theme park rides.The Utopia board uses a matrix management structure (the structure is shown below). The structure has led to confusion and conflict at times, for example when decisions are being made regarding marketing activity in a region it is unclear whether the regional director or the marketing director has the final say.Board structureUtopia Company is organised in a matrix structure, as shown below.9Exhibit 2A transcript of a telephone conversation held between you and Moeen Hasan, Utopia Company’s CEO, and an associated email.EmailEmail attachmentExtracts from minutes of a recent Utopia Company board meeting.An email received from Tara Adenowo, your line manager and the finance director of Utopia Company.End of question paper。
Lecture Slides.ppt

August 17, 2005
The 2005 Imperial Oil Summer Institute for Computer Studies Teachers
Presentation Outline
• Computer Engineering at UW • Computer Engineering Education Trends • UW Initiatives for Improving Computer Engineering Education • What Can You Do At Your School? • Conclusions
Computer Engineering: Education Trends and Initiatives The 2005 Imperial Oil Summer Institute for Computer Studies Teachers, Waterloo, Ontario, Canada
பைடு நூலகம்
Computer Engineering: Education Trends and Initiatives The 2005 Imperial Oil Summer Institute for Computer Studies Teachers, Waterloo, Ontario, Canada
Third and Fourth Year
• In third and fourth year, the laboratory studies require substantial engineering analysis and design
– A few students are simply unable to make this transition – Critical thinking skills are essential
iSlide

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Provide color analysis tools to help users understand and apply color psychology.
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Allow users to edit and adjust icons, such as changing color, size, etc.
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Multiple chart types
Provides various types of charts, such as bar charts, line charts, pie charts, etc.
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03
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Managerial reasons for diversification
Diversification
Acquiring new activities either unrelated to its existing activities.
related
to
or
New products or services.
Product markets Product Existing New Existing 1 3 New 2 4 Geographical markets Existing 5 7 New 6 8
move from box 1 to boxes 2, 3 or 4 move from box 5 to boxes 6, 7 or 8.
EC3203 Economics of Corporate Strategy
Diversification, Mergers & Acquisitions
Diversification
Why do firms diversify?
Efficiency-based reasons for diversification
Economic Arguments for Diversification
Push factors
Poor performance and unhappy shareholders. Limited size of the existing market. Existence of underutilized resources/assets. Surplus investment resources that could be used to finance new activities. Greater profit and growth in new sectors. Greater expected profit the greater the pull. Higher degree of uncertainty in new products and new markets. Commitment of financial and managerial resources for uncertain returns.
Will the new unit gain competitive advantage from the link with the existing business?
Studies
Rumelt (1974) found:
Highly diversified firms performed less well than that more focused or less diversified enterprises, but that diversified firms grew faster than single-product firms. Related activities were more profitable than firms engaged in unrelated diversification.
To identify economies of scale in multi business firms, the “relatedness” concept was developed by Richard Rumelt. Two businesses are related if they share technological characteristics, production characteristics and/or distribution channels.
Classification by Relatedness
Type Proportion of Revenue from Primary Activity >95% Example
Single
Dominant
பைடு நூலகம்
70 – 95%
Related
<70%
Conglomerate
<70%
Firm’s Portfolio of Activities
Selling existing products in new geographically distinct markets. Diversify in terms of new products or new markets as illustrated in Table 1.
Directions of diversification – Table 1
SWOT Analysis SWOT = strengths, weaknesses, opportunities and threats. Existing products – product characteristics. Existing markets – demand growth rate, price and income elasticities of demand. Existing markets – supply structure. The competitive strengths of competitors.
Pandya and Rao (1998) found:
Diversified firms better performance in terms dispersion. Undiversified better returns. Diversification discount applied by stock market.
Classification by Relatedness
A single business firm derives more than 95 percent of its revenues from a single activity.
A dominant business firm derives 70 to 95 percent of its revenues from its principal activity. A related business firm derives less than 70 of its revenue from its primary activity, but its other lines of business are related to the primary one. An unrelated business firm or a conglomerate derives less than 70 percent of its revenue from its primary area and has few activities related to the primary area.
1. The attractiveness吸引力 test
Is the industry structurally attractive?
2. The cost-of-entry test
Must not capitalise all future profits
3. The better-off test 经济情况好的,利益好的
Assess position in each market relative to rival. Record results in matrix – Table 2.
Table 2: Categorizing a firm's portfolio of activities or products
of
Diversification and Long-Term Performance
Long term performance of diversified firms appear to be poor. One third to one half of all acquisitions and over half of all new business acquisitions are eventually divested. Corporate refocusing of the 1980s could be viewed as a correction to the conglomerate merger wave of the 1960s. Another view is that both the conglomerate diversification of the 60s and the refocusing of the 80s could be value creating. Conditions in the 60s could have favored unrelated diversification and these conditions could since have changed. Example: Anti-trust climate
Table 2: Strategies
Box 9: high-growth and strongly competitive.
Commit resources.
Boxes 3 and 6: high-growth sectors.
Box 3: weakly competitive – exit. Box 6: averagely competitive – exit or commit.