Building An Acceptance Chart
- Topics:
- Specifications and Control
- Tags:
- Process,
- QCI International
- Source:
- QCI International
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Overview: There are some processes that, due to their nature, are expected to have unavoidable shifts in their average value but which are still able to satisfy customer-established specifications. This situation occurs when the standard deviation of the process at the various average values of the process is very small relative to the tolerance width, that is, the difference between the upper and lower specification limits. It appears that three different kinds of charts are being generated for this aforementioned situation. However, there is only one type: a chart using sample averages that allows detecting when processes will produce an unacceptable level of nonconforming products. Hence, the references to "acceptance control charts" should really be changed to "acceptance charts" because these charts deal only with the issue of whether the process should be accepted or rejected. In addition, there are two different issues: acceptance and control. These two issues are independent of each other.
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Format: HTML | Date: Jan 2003 | Pages: 1
