文档介绍：Design of Experiments (DOE)
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FORD PANY
CORPORATE QUALITY DEVELOPMENT CENTER
DEARBORN, MI
Copyright © 2001 Ford pany
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Table of Contents
Introduction 3
Agenda 3
Purpose of the Course 5
Goal 5
Objectives 5
Design of Experiments (DOE) History 7
DOE and the STA Engineer 7
Definition of DOE 7
Uses of DOE 9
Planning 10
Steps for Experimental Design 10
DOE Plan Analysis 13
Common Failures 13
Influences on Control Factors 13
Evaluation Procedures 15
Steps of the DOE 17
Checklist for DOE 19
Questions to Ask the Supplier about the Plan 21
Adding up (Pool) Standard Deviations 22
Steps for Simple Analysis 24
Factorial Experiments 25
Basic Concept 25
Interaction Effects 29
Fractional Factorials 30
Use of the Results 32
A Practical Aid for Experimenters 33
Significance of Factor Effects 35
Activity: Typical Three-factor two-level experiment 36
Fractional Factorial Design 37
DOE Methods 39
Classical Versus Taguchi Methods 39
Taguchi’s Loss Function 41
Optimal cost of quality 42
Taguchi Method 44
Taguchi Cake-Baking Example 45
Tips from Taguchi 47
Signal-to-Noise Ratio 49
Controlling Noise 51
Inner and Outer Arrays 52
Signal to Noise for Maximum or Minimum 54
Confirming the Experiment 56
Evolutionary Operation (EvOp) 58
ANOVA Methods 60
Assumptions for Applying ANOVA 60
Analysis of Variance 62
Calculations for ANOVA Table 64
Case Studies 69
Case Study 1 — The Mismatched Muffler 70
Case Study 2 71
Summary 74
Additional Resources 76
Subject Matter Expert (SME) 76
Additional Training 76
References 76
Review of Answers to Pre-Test and Post-Test 77
Introduction
e to the Design of Experiments (DOE) course, part of the Corporate Quality Development Center curriculum. Thi