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Design of Variance CUSUM
- 이은경;
- 홍성훈;
- 이윤동
초록
We suggest a fast and accurate algorithm to compute ARLs of CUSUM chart for controling process variance. The algorithm solves the characteristic integral equations of CUSUM chart (for controling variance). The algorithm is directly applicable for the cases of odd sample sizes. When the sample size is even, by using well-known approximation algorithm combinedly with the new algorithm for neighboring odd sample sizes, we can also evaluate the ARLs of CUSUM charts efficiently and accurately. Based on the new algorithm, we consider the optimal design of upward and downward CUSUM charts for controling process variance.
키워드
CUSUM; process variance; chi-squared distribution.