CHAPTER 22
Measurement Process: Statistical Concepts
None plan to fail;but most fail to planPlan the work,Work the plan
– Anonymous
SYNOPSIS
Measurement process is like a manufacturing process affected by variation due to ‘common’ and ‘special’ causes. Based on this understanding, the concepts of ‘bias’ and ‘precision’ are developed. Both are essential for ‘calibration’ of an instrument. Precision termed more ‘precisely’ as gage R&R is the basis for determining the suitability of an instrument for any application to ensure that the data on measurements are not influenced by instrument variation.
Measurement system ‘ideal’ but measurements are not identical
One is familiar with making measurements. An experience commonly found by anyone accustomed ...
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