This article proposes a variable sampling interval (VSI) X<SUP>-</SUP> control chart using weighted standard deviation (WSD) method for skewed populations. The WSD method decomposes the standard deviation of a quality characteristic into u...
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https://www.riss.kr/link?id=A99935552
2014
Korean
KCI등재
학술저널
1-12(12쪽)
0
상세조회0
다운로드다국어 초록 (Multilingual Abstract)
This article proposes a variable sampling interval (VSI) X<SUP>-</SUP> control chart using weighted standard deviation (WSD) method for skewed populations. The WSD method decomposes the standard deviation of a quality characteristic into u...
This article proposes a variable sampling interval (VSI) X<SUP>-</SUP> control chart using weighted standard deviation (WSD) method for skewed populations. The WSD method decomposes the standard deviation of a quality characteristic into upper and lower deviations and adjusts control limits and warning limits of a control chart in accordance with the direction and degree of skewness. A control chart constant is derived for estimating the standard deviation of skewed distributions with the mean of sample standard deviations. The proposed chart is compared with the conventional VSI X<SUP>-</SUP> control chart under some skewed distributions. Simulation study shows that the proposed WSD VSI chart can control the in-control average time to signal (ATS) as an adequate level better than the conventional VSI chart, and the proposed chart can detect a decrease in the process mean of a quality characteristic following a positively skewed distribution more quickly than the standard VSI chart.
목차 (Table of Contents)
Steiner Ring Star 문제를 해결하기 위한 새로운 Mixed-Integer Programming Modeling
소비자 키워드광고 탐색패턴에 나타난 촉진지향성이 온라인 여행상품 구매확률에 미치는 영향