Chapter 12 – Design for Six Sigma[第12章 - 六西格玛设计](PPT-49).pptVIP

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Chapter 12 – Design for Six Sigma[第12章 - 六西格玛设计](PPT-49).ppt

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Chapter 12 – Design for Six Sigma[第12章 - 六西格玛设计](PPT-49)

Rev. 02/26/06 SJSU Bus. 142 - David Bentley * Optimizing Reliability Standardization Redundancy Physics of failure THE MANAGEMENT AND CONTROL OF QUALITY, 5e, ? 2002 South-Western/Thomson LearningTM (Mod 11/11/02 DAB) 02/25/06 SJSU Bus. 142 - David Bentley * Design Verification Ensure that process capability meets the appropriate sigma level Meet specifications (AND customer requirements) Tools Reliability testing Measurement systems evaluation Process capability determination Rev. 02/26/06 SJSU Bus. 142 - David Bentley * Reliability Testing Life testing Accelerated life testing Environmental testing Vibration and shock testing Burn-in THE MANAGEMENT AND CONTROL OF QUALITY, 5e, ? 2002 South-Western/Thomson LearningTM (Mod 11/11/02 DAB) 02/26/06 SJSU Bus. 142 - David Bentley * Measurement System Evaluation Variation can be due to: Process variation Measurement system error Random Systematic (bias) A combination of the two 02/26/06 SJSU Bus. 142 - David Bentley * Metrology - 1 Definition: The Science of Measurement Accuracy How close an observation is to a standard Precision How close random individual measurements are to each other 02/26/06 SJSU Bus. 142 - David Bentley * Metrology - 2 Repeatability Instrument variation Variation in measurements using same instrument and same individual Reproducibility Operator variation Variation in measurements using same instrument and different individual 02/26/06 SJSU Bus. 142 - David Bentley * RR Studies Select m operators and n parts Calibrate the measuring instrument Randomly measure each part by each operator for r trials Compute key statistics to quantify repeatability and reproducibility 02/25/06 SJSU Bus. 142 - David Bentley * RR Spreadsheet Template 02/26/06 SJSU Bus. 142 - David Bentley * RR Evaluation Acceptable: 10% Unacceptable: 30% Questionable: 10-30% 02/26/06 SJSU Bus. 142 - David Bentley * Calibration Compare 2 instruments or systems 1 with known relationship to national standards 1 with unknown relationship