Hybrid genetic algorithm for the economic-statistical design of variable sample size and sampling interval x-bar control chart

Mohammad Mirabi; Mohammad Taghi Fatemi Ghomi; Fariborz Jolai

Volume 8, Issue 2 , January 2022, , Pages 160-174


  The design of control chart has economic consequences that pure statistical viewpoint does not consider them. The economic-statistical design of control chart, attends not only statistical properties such as average time to signal (ATS) but also economic consequences like hourly expected total cost. ...  Read More

Performance of CCC-r control chart with variable sampling intervals

Mohammad Saber Fallah nezhad; Yousof Shamstabar; Mohammad Mahdi Vali Siar

Volume 4, Issue 2 , December 2017, , Pages 19-34


  The CCC-r chart is developed based on cumulative count of a conforming (CCC) control chart that considers the cumulative number of items inspected until observing r nonconforming ones. Typically, the samples obtained from the process are analyzed through 100% inspection to exploit the CCC-r chart. However, ...  Read More