Chapter 8 Product Evaluation for Performance and the Effects of Variation

8.1 Introduction

8. 2 The importance of Functional Evaluation 8 8.2 The importance of Functional Evaluation 8.3 The Goals of Performance Evaluation Evaluation of product performance must support these factor

8.4 Accuracy, Variation, and Noise

8.4.1 The Effect of Variation on Product Quality Some examples of control Controlling the temperature of food Control the feel of power steering so the feel of the car stays constant regardless of road condition Controlling the dimensions of part so they will fit with other parts regardless of variation in the mating parts.

Noises are classified as: █ Environmental, or External, condition Example of BikeE Suspension performance

The things without control Robust Design:

8.5 Model for performance Evaluation 8.5.1 8.5.2 8.5.3

8.5.4 Analytical mode, number of isssues were raised

8.5.5

8.5.6 8.5.7 8.5.8

8.6 Tolerance Analysis 8.6.1 The difference Between Manufacturing Variations and Tolerance 3 standard deviation(99.68%) 6 standard deviation

8.6.2 General Tolerancing Consideration

8.6.3 Additive Tolerance Stack-Up

Worse case analysis: Minimum length lb=19.97mm Maximum washer lw=1.95mm ls= 24.1mm Lg =0.23mm

8.6.4 Statistical Stack-up Analysis

8.7 Sensitivity Analysis

8.8 Robust Design By Analysis

8.9 Robust Design Through Testing

8.9.4 8.9.5