Measurement Process Characterization
2.4. Gauge R & R studies
Design considerations for a gauge study are choices of:
|Selection of artifacts or check standards||The artifacts for the study are check standards or test items of a type that are typically measured with the gauges under study. It may be necessary to include check standards for different parameter levels if the gauge is a multi-response instrument. The discussion of check standards should be reviewed to determine the suitability of available artifacts.|
|Number of artifacts||The number of artifacts for the study should be Q (Q > 2). Check standards for a gauge study are needed only for the limited time period (two or three months) of the study.|
|Selection of operators||
Only those operators who are trained and experienced with the gauges
should be enlisted in the study, with the following constraints:
|Selection of gauges||
If there is only a small number of gauges in the facility, then all
gauges should be included in the study.
If the study is intended to represent a larger pool of gauges, then a random sample of I (I > 3) gauges should be chosen for the study.
|Limit the initial study||
If the gauges operate at several parameter levels
(for example; frequencies), an initial study should
be carried out at 1 or 2 levels before a larger study is undertaken.
If there are differences in the way that the gauge can be operated, an initial study should be carried out for one or two configurations before a larger study is undertaken.