caa a22 4500 378910264 CHVBK 20180305123540.0 cr unu---uuuuu 161128e200404 xx s 000 0 eng 10.1515/EQC.2004.7 doi (NATIONALLICENCE)gruyter-10.1515/EQC.2004.7 Economic Design of A Dynamic CCC - r Chart for High-Yield Processes [Elektronische Daten] [Kazuki Kudo, Hiroshi Ohta, Etsuko Kusukawa] Recently, Ohta et al. [Quality and Reliability Engineering International 17: 439-446, 2001] have studied the economic design of CCC(Cumulative Count of Conforming)-r charts for high-yield processes assuming a fixed hazard rate. Generally, however, the hazard rate is varying over time. With the ageing of a process, the hazard rate gets first gradually smaller, while during the last stage of the wear-out process, the hazard rate increases. For such processes, the Weibull distribution is used to model the circumstances. In this paper, we discuss an economic design of a dynamic CCC - r chart with time-varying parameters. Concretely, we propose a process control model for a Weibull distributed-shock model and determine the initial values and dynamic decision rules for the time-varying parameters of the CCC-r chart, that is, the required number of nonconforming observations r, the sampling interval h, and the lower control limit LCL maximizing the expected profit per unit time derived from the process. Finally, we compare the profits obtained applying a dynamic CCC - r chart with those obtained with a traditional static CCC - r chart. © Heldermann Verlag Kudo Kazuki Department of Industrial Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai Osaka 599-8531, Japan. kudo@ie.osakafu-u.ac.jp aut Ohta Hiroshi Department of Industrial Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai Osaka 599-8531, Japan. ohta@ie.osakafu-u.ac.jp aut Kusukawa Etsuko Department of Industrial Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai Osaka 599-8531, Japan. kusukawa@ie.osakafu-u.ac.jp aut Economic Quality Control Walter de Gruyter GmbH & Co. KG 19/1(2004-04), 7-21 0940-5151 19:1<7 2004 19 EQC https://doi.org/10.1515/EQC.2004.7 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1515/EQC.2004.7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kudo Kazuki Department of Industrial Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai Osaka 599-8531, Japan. kudo@ie.osakafu-u.ac.jp aut NATIONALLICENCE 700 1- Ohta Hiroshi Department of Industrial Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai Osaka 599-8531, Japan. ohta@ie.osakafu-u.ac.jp aut NATIONALLICENCE 700 1- Kusukawa Etsuko Department of Industrial Engineering, Osaka Prefecture University, 1-1 Gakuencho, Sakai Osaka 599-8531, Japan. kusukawa@ie.osakafu-u.ac.jp aut NATIONALLICENCE 773 0- Economic Quality Control Walter de Gruyter GmbH & Co. KG 19/1(2004-04), 7-21 0940-5151 19:1<7 2004 19 EQC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter