MSA测量系统分析报告.pptx

Training Material forMEASUREMENTSYSTEMANALYSISContents :INTRODUCTION FOR MEASUREMENT SYSTEM ANALYSIS GENERAL METHODS ILLUSTRATION FOR MEASUREMENT SYSTEM ANALYSISVARIABLE GAGE ANALYSIS METHOD 1) THE AVERAGE-RANGE METHOD 2) THE ANOVA METHODATTRIBUTE GAGE ANALYSIS METHOD 1) SHORT METHOD 2) HYPOTHESIS TEST ANALYSIS 3) SIGNAL DETECTION THEORY 4) LONG METHODACCEPTABILITY CRITERIACONCLUSIONFOUR METHODS COMPARISONIntroduction: Basic requirements by QS-9000 TS16949 Base on QS9000 TS16949 requirements, all measurement system which were mentioned in Quality Plan should be conducted Measurement System Analysis. MSA RequirementIntroduction: The category of Measurement System Most industrial measurement system can be divided two categories, one is variable measurement system, another is attribute measurement system. An attribute gage cannot indicate how good or how bad a part is , but only indicates that the part is accepted or rejected. The most common of these is a Go/No-go gage.Attribute Gage (Go/No-go Gage)Variable GageOperationOutputInputValueMeasurementAnalysisProcess to be ManagedDecisionIntroduction: What is a measurement processMeasurement: The assignment of a numerical value to material things to represent the relations among them with respect to a particular process. Measurement Process: The process of assigning the numerical value to material things.General ProcessMeasurement ProcessIntroduction: What are the variations of measurement processσobs = σ actual + σ variance of the measurement system 222Introduction: What are the variations of measurement processMeasurement(Observed) Value = Actual Value + Variance of The Measurement SystemIntroduction: Where does the variation of measurement system come from? The Five Characterizations of Measurement System: 1. Location Variation: Bias; Stability; Linearity Bias is the difference between the observed average of measurements and a reference value. Bias is often referred to as accuracy. It is a systematic erro