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Process Control Techniques for High-Volume Production by M. Kemal Atesmen

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9

CORRELATION BETWEEN TWO GAGES

When we are dealing with two or more gages measuring the same parameter, we have to determine if the measurements made by these gages correlate accurately with each other. These correlation exercises can be performed on gages within your company’s divisions, between your company’s and your customer’s divisions, or between your company’s and your subcontractor’s divisions.

Before taking any data for gage correlation, we have to make sure that gages are calibrated to well established standards (see Chapter 1), measurement procedures are well defined and released officially in document control, and the monitor control chart for each gage is in control. Data taken for correlation purposes should cover a range beyond ...

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