ASQ - Statistics Division

Accounting for Measurement System Variability – Mini Paper Taken from the Fall 1999 Newsletter

Abstract: To properly estimate process variability, one must estimate total variability and measurement system variability. The actual process variability can be obtained by subtracting the measurement system variability from the total variability. An example shows how to apply this technique to a manufacturing process.

Keywords: Variability - Measurement system variability - Control charts - X-bar and R chart - Capability - Cpk

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