04Workshop GRR.pptVIP

Validate Measurement SystemTest-Retest Technique Validate Measurement SystemGage RR TechniqueANOVA method Analyze GRR Data: Learning Objectives Review the terms Reproducibility and Repeatability. Describe the step for a GRR study Review the set up of data sheet for a GRR study Analyze GRR data using MiniTab Understand the guidelines for determining the acceptance of a gage Determine the acceptance of a measurement system from GRR analysis in Minitab. Measurement System Analysis Accuracy – the differences between observed average measurement and a standard Repeatability – variation when one person repeatedly measures the same unit with the same measuring equipment Reproducibility – variation when two or more people measure the same unit with the same measuring equipment Stability – variation obtained when the same person measures the same unit with the same equipment over an extended period of time Linearity – the consistency of the measurement system across the entire range of the measurement system Gage RR Exercise: ANOVA method Bolt Exercise Analyzing Gage RR Results—Review Validate Measurement SystemGage RR TechniqueAttribute Data (ARR) Take Aways—Measurement Systems Analysis Variation in the measurement system will contribute to the observed variation in a process. The resolution is the ability of the gage to see the variation in the process. The gage scale should divide the tolerance into at least ten parts The gage should be accurate: mean close to the true mean of the process, and precise: small variation The Gage Reproducibility and Repeatability Study is a more detailed study of the measurement system. repeatability (equipment variation or EV) reproducibility (appraiser variation or AV) Key Points/Messages: Review the Bullet Points Examples For Use/Application: Think in terms of shooting at a target. ACCURACY, How well do you hit the target. Do you hit where you are aiming REPEATABILITY, Can you keep hitting the target in the same