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題名 Monitoring and diagnosing process loss using a weighted-loss control chart
作者 Yang, Su-Fen;Lin, Liang Yu
楊素芬;林亮妤
貢獻者 統計系
關鍵詞 Control charts; Loss control; Loss functions; Variable sampling intervals; Markov processes
日期 2014-11
上傳時間 16-Jun-2015 17:08:50 (UTC+8)
摘要 Product and service quality and productivity loss are all crucial competitive factors of companies in numerous industries. The loss function is a popular method for measuring the loss caused by variations in product or service quality. This study proposes a weighted-loss (WL) control chart to monitor the loss variation among manufacturing or service processes. Because loss is caused by a quality variable deviating from its target value, we set up two corresponding control charts to diagnose the sources of out-of-control loss and implement processes to correct these losses. We further present a WL chart using optimal variable sampling intervals (VSIs) in order to detect out-of-control losses faster compared with a WL chart using a fixed sampling interval (FSI). An example then demonstrates and evaluates the ability of the proposed VSI WL control chart to monitor and diagnose out-of-control process loss. Numerical analyses indicate that the optimal VSI WL chart outperforms the FSI WL chart, the joint X¯ and S2 charts and the VSI Average Loss chart in detecting out-of-control process loss. Thus, the proposed VSI WL chart is recommended.
關聯 Quality and Reliability Engineering International, 30(7), 951-959
資料類型 article
DOI http://dx.doi.org/10.1002/qre.1670
dc.contributor 統計系
dc.creator (作者) Yang, Su-Fen;Lin, Liang Yu
dc.creator (作者) 楊素芬;林亮妤zh_TW
dc.date (日期) 2014-11
dc.date.accessioned 16-Jun-2015 17:08:50 (UTC+8)-
dc.date.available 16-Jun-2015 17:08:50 (UTC+8)-
dc.date.issued (上傳時間) 16-Jun-2015 17:08:50 (UTC+8)-
dc.identifier.uri (URI) http://nccur.lib.nccu.edu.tw/handle/140.119/75861-
dc.description.abstract (摘要) Product and service quality and productivity loss are all crucial competitive factors of companies in numerous industries. The loss function is a popular method for measuring the loss caused by variations in product or service quality. This study proposes a weighted-loss (WL) control chart to monitor the loss variation among manufacturing or service processes. Because loss is caused by a quality variable deviating from its target value, we set up two corresponding control charts to diagnose the sources of out-of-control loss and implement processes to correct these losses. We further present a WL chart using optimal variable sampling intervals (VSIs) in order to detect out-of-control losses faster compared with a WL chart using a fixed sampling interval (FSI). An example then demonstrates and evaluates the ability of the proposed VSI WL control chart to monitor and diagnose out-of-control process loss. Numerical analyses indicate that the optimal VSI WL chart outperforms the FSI WL chart, the joint X¯ and S2 charts and the VSI Average Loss chart in detecting out-of-control process loss. Thus, the proposed VSI WL chart is recommended.
dc.format.extent 329463 bytes-
dc.format.mimetype application/pdf-
dc.relation (關聯) Quality and Reliability Engineering International, 30(7), 951-959
dc.subject (關鍵詞) Control charts; Loss control; Loss functions; Variable sampling intervals; Markov processes
dc.title (題名) Monitoring and diagnosing process loss using a weighted-loss control chart
dc.type (資料類型) articleen
dc.identifier.doi (DOI) 10.1002/qre.1670
dc.doi.uri (DOI) http://dx.doi.org/10.1002/qre.1670