Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 1

Cumulative conformance count Related Publications

1 A Markov Chain Approximation for ATS Modeling for the Variable Sampling Interval CCC Control Charts

Authors: C. Y. Chen, Y. K. Chen, K. C. Chiou

Abstract:

The cumulative conformance count (CCC) charts are widespread in process monitoring of high-yield manufacturing. Recently, it is found the use of variable sampling interval (VSI) scheme could further enhance the efficiency of the standard CCC charts. The average time to signal (ATS) a shift in defect rate has become traditional measure of efficiency of a chart with the VSI scheme. Determining the ATS is frequently a difficult and tedious task. A simple method based on a finite Markov Chain approach for modeling the ATS is developed. In addition, numerical results are given.

Keywords: Markov Chain, control chart, average time to signal, Cumulative conformance count, variable sampling interval

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