Table of Contents
Introduction ................................................................................................ 3
Agenda........................................................................................................................ 3
Purpose....................................................................................................................... 3
Goal............................................................................................................................. 3
Objectives ................................................................................................................... 5
Measurement Systems............................................................................... 7
Terminology................................................................................................................. 7
National Institute of Standards Technology (NIST) ..................................................... 9
Reasons for Measurement Systems Analysis (MSA) .................................................. 9
Accuracy vs. Precision .............................................................................................. 11
Single Opportunity Measurement Process ................................................................ 13
Multiple Opportunity Measurement Process.............................................................. 13
Types of errors .......................................................................................................... 15
Tool Care .................................................................................................................. 17
Measuring Instruments.............................................................................................. 17
Supplier Preparation for a Measurement Systems Study.......................................... 19
Conducting a Measurement Systems Study ............................................................. 21
Principles for Assessing Measurement Systems ...................................... 23
Types of Measurement System Variation.................................................................. 23
Bias ........................................................................................................................... 24
Repeatability.............................................................................................................. 25
Reproducibility........................................................................................................... 27
Stability...................................................................................................................... 27
Linearity..................................................................................................................... 29
Example: Bias .......................................................................................................... 31
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