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Optimization of Multiple Quality Characteristics Using Desirability Function Advanced Tools of Quality Engineering.

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Presentation on theme: "Optimization of Multiple Quality Characteristics Using Desirability Function Advanced Tools of Quality Engineering."— Presentation transcript:

1 Optimization of Multiple Quality Characteristics Using Desirability Function Advanced Tools of Quality Engineering

2 The desirability approach The method finds operating conditions X that provide the "most desirable" response values Xi - Quality characteristics Yi(x) - Response values for Xi di(Yi) - Desirability of response Yi(Xi) D – Overall desirability achieved

3 The desirability approach Nominal-the-best (NTB)

4 The desirability approach Smaller-the-better (STB)

5 The desirability approach Larger-the-better (LTB)

6 The desirability approach

7 Example The controllable factors : X1 - Hydrated silica level X2 - Silane coupling agent level X3 - sulfur level. The responses to be optimized : Y1 - PICO Abrasion index (120 < Y1 )LTB Y % modulus (1000 < Y2 ) LTB Y3 - Elongation at break (400 < Y3<600)NTB Y4 - Hardness (60 < Y4 < 75) NTB

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