DOE 模板
DESIGN OF EXPERIMENTS TEMPLATE
Step 1: State Objective
Objective of Experiment: Reflow profile [LED]
Critical Characteristic(s): Temperature area and convey speed
Desired Outcome: LED profile
Step 2: Select Output Response(s)
Identify the following for each output response.
Desired Outcome (min., max., target):
Unit of Measure:
Instrument (name, MFG., model):
Measurement Method(brief description):
Measurement System Error (%):
Alternative Measurement Method:
Step 3: Select Input Variables
Input Variables - to be varied in the experiment
a 2, etc. for each response. Add additional columns for more than two output responses. Expected Interactions
Uncontrollable Variables
Step 4: Select Experiment Type
Full and Fractional Factorials
Number of input variables:
Blocking: (yes, no)
Number of runs:
Number of center points:
Resolution: (R3, R4, R5, > R5)
Insert base design layout: (optional)
Response Surface Models
Number of input variables:
Blocking: (yes, no)
Number of runs:
Number of center points:
Axial Scaling: ( rotatable, orthogonal, on face, user specified)
Design Type: (CCD or Box Behnken)
Insert base design layout: (optional)
Other Types of Designs
Number of input variables:
Blocking: (yes, no)
Number of runs:
Number of levels:
Number of center points:
Insert base design layout: (optional)
Step 5 Define Experimental Strategy
Define the experimental unit:
Is the process stable? (prior and during the experiment) - Yes/no Estimate Sample Size
Categorical Output Response
Use np ≥ 5 guideline for character (categorical) data. For example, if p=.01, (1% defective); then n (sample size) ≥ 5 /.01 ≥ 500 per experimental run.
Scaled Output Response
1Best
2Better
3Average
4Poor
5Worst
Guideline: The scale must measure the range of the variation. Example - rank the best unit a 1, rank the worst unit a 5, and so on.
Randomization scheme
(Examples - full randomization, hard to change input variable scheme, other)
if other, briefly explain.
INTERIM REPORT - Steps 1-5.
Step 6: Run Experiment
The documentation for step 6 should include the raw data.
Insert data sheet with data recorded:
Step 7: Fit Model
Documentation for step 7 should include:
Graphical -
Numerical - Summary of Fit, Analysis of Variance, Lack of Fit, Parameter Estimates, Effect Test
Step 8: Diagnose Model
Documentation for step 8 should include residual test:
Test for normality
Test for equal variance
Test for independence
Test for variance reduction factor
Step 9: Interpret Model
Documentation for step 9 should include:
Prediction profiler with the input variables set at the best setting to meet the
experimental objective.
Cube Plot (two level designs)
Interaction Plots
Contour Plot (RSM)
Contour Profiler
Prediction Equation
Step 10: Run Confirmation
Did the experiment confirm- yes / no
Recommended next step
FINAL REPORT
Verify that all the necessary information in the documentation template is entered accurately for steps 1-10. The final report may be used to present the results to a supervisor or the team.