ECONOMIC-STATISTICAL DESIGN OF DOUBLE SAMPLING S CONTROL CHART

Ming Ha Lee, Michael B.C. Khoo

Abstract: In this study, an economic-statistical design of the double sampling (DS) s chart is investigated. The optimal design parameters of the DS s chart are obtained by minimizing the cost subject to statistical constraints. The effectiveness of the DS s chart is evaluated by comparing its minimized cost against the cost of the Shewhart s chart. The comparison demonstrates the superiority of the DS s chart over the Shewhart s chart, where the DS s chart is economically superior to the Shewhart s chart. Sensitivity analyses are performed to investigate the effect of the cost parameters, process parameters and statistical properties on the design parameters, as well as the corresponding in-control average time to signal, out-of-control average time to signal and cost.

Keywords: double sampling, economic design, economic-statistical, design, s chart

DOI: 10.18421/IJQR12.02-04

Recieved: 28.11.2017  Accepted: 13.01.2018  UDC: 519.248

Reads: 1328   

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