Browsing by Author "J.S.Huang"

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相關不良品檢驗對生產管制影響的推廣
(交大學刊編輯委員會, 1978-07)
黃俊雄
;
楊照崑
;
J.S.Huang
;
M.C.K.Yang
A production process with two quality levels and four states is presented.A sequence (k) sampling plan in which samples of k(k>0) consecutively produced items are taken periodically,and a simple decision rule based on the result of inspecting each sample are applied to control the process. It is assumed that each item has two correlated attributes X and Y. In practice, the cost of inspection of X is higher than the cost of inspection of Y and the result of inspectig X determines the item is good (acceptable) or bad (unacceptable).The problem of whether to use the inspection of X or Y is studied and some approximation results are obtained to compare the two inspection costs corresponding to X and Y.
相關不良品檢驗對生產過程管制的影響
(交大學刊編輯委員會, 1977-09)
黃俊雄
;
楊照崑
;
J.S.Huang
;
Mark C.K.Yang
In a continuous production process,samples of the products are taken and inspacted at regular time intervals.A statistic of each sample is plotted on a chart to control the production process.In many cases, the inspection of one attribute X of the product is too costly(e.g. destructive inspection), and one would try to take a less costly but less reliable inspection of another attribute Y of the product . This paper tries to answer the question that under what conditions this new attribute Y should be inspected. A simple Markov model for the production process is presented and the cost factors including cost of a defective, cost of inspection and cost of taking corrective action are considered.An approximate relationship between two different inspection costs corresponding to X and Y is found when both inspections are under optimal inspection schemes.