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Memory-Type control Charts Through the Lens of Cost Parameters

Intelligent Automation & Soft Computing 2023年第4期36卷 1-10页

作者： Sakthiseswari Ganasan You Huay Woon Zainol Mustafa Dadasaheb G.Godase Pusat Pengajian Sains Matematik Fakulti Sains dan TeknologiUniversiti Kebangsaan MalaysiaUKM BangiSelangor43600Malaysia Pusat GENIUS@Pintar Negara Universiti Kebangsaan MalaysiaUKM BangiSelangor43600Malaysia Shivaji University Kolhapur416004India

A memory-type control chart utilizes previous information for chart *** example of a memory-type chart is an exponentially-weighted moving average(EWMA)control *** EWMA control chart is well-known and widely employed by practitioners for monitoring small and moderate process mean ***,the EWMA median chart is robust against *** light of this,the economic model of the EWMA and EWMA median control charts are commonly *** study aims to investigate the effect of cost parameters on the out-of-control average run lengthðARL_(1)Þin implementing EWMA and EWMA median control *** economic model was used to compute the ARL_(1) *** 14 input parameters were identiﬁed and the analysis was carried out based on the one-parameter-at-a-time *** the input parameters change based on a predetermined percentage,the ARL_(1) is *** to the results of the EWMA chart,nine input parameters had an effect andﬁve input parameters had no effect on the ARL_(1) ***,only seven of the 14 input parameters had an effect on the ARL_(1) of the EWMA median ***,the effect of each input parameter on the ARL_(1) was ***,the ARL_(1) for the EWMA median chart was smaller than the EWMA *** analysis is crucial to observe and determine the input parameters that have a signiﬁcant impact on the ARL_(1) of the EMWA and EWMA median control ***,practitioners can obtain an overview of the inﬂuence of the input parameters on the ARL_(1) when implementing the EWMA and EWMA median control charts.

关键词： Economic model average run length memory-type control chart cost parameters statistical quality control

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VPLS Based quality and Cost control for Tennessee Eastman Process

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Chinese Journal of Chemical Engineering 2005年第1期13卷 62-67页

作者：宋凯王海清李平 National Laboratory of Industrial control Technology Institute of Industrial Process control Zhejiang University Hangzhou 310027 China

Product quality and operation cost control obtain increasing emphases in modern chemical system engineering. To improve the fault detection power of the partial least square (PLS) method for quality control, a new QRPV statistic is proposed in terms of the VP (variable importance in projection) indices of monitored process variables, which is significantly advanced over and different from the conventional Q statistic. QRPV is calculated only by the residuals of the remarkable process variables (RPVs). Therefore, it is the dominant relation between quality and RPV not all process variables (as in the case of the conventional PLS) that is monitored by this new VP-PLS (VPLS) method. The combination of QRPV and T2 statistics is applied to the quality and cost control of the Tennessee Eastman (TE) process, and weak faults can be detected as quickly as possible. Consequently, the product quality of TE process is guaranteed and operation costs are reduced.

关键词： partial least squares method Tennessee Eastman process statistical quality control cost control on-line monitoring

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Off-Line quality control in Bioproducts Processing: A Case Study in Greece

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Open Journal of Statistics 2016年第2期6卷 229-238页

作者： Ioannis S. Triantafyllou Department of Statistics and Insurance Science University of Piraeus Piraeus Greece

In the present article we study the production of grape molasses. Data drawn from a specified biolaboratory, are properly analyzed in order to detect factors that affect significantly the Brix value and the volatile acidity of the final product. The ground that is used for planting and a variety of grapes have been taken into account. Off-line statistical quality control techniques have been employed and the outcomes are displayed and discussed in detail.

关键词： Grape Molasses Bioproduct statistical quality control Analysis of Variance

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AOQ and ATI for Double Sampling Plan with Using Fuzzy Binomial Distribution

AOQ and ATI for Double Sampling Plan with Using Fuzzy Binomi...

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2010 International Conference on Intelligent Computing and Cognitive Informatics (ICICCI 2010)

作者： Ezzatallah Baloui Jamkhaneh Bahram Sadeghpour Gildeh Department of Statistics Islamic Azad UniversityGhaemshahr BranchGhaemshahrIran Department of Statistics Faculty of Basic ScienceUniversity of MazandaranBablosarIran

in this paper we introduce the average outgoing quality （AOQ） and average total inspect （ATI） for double sampling plan when that proportion nonconforming items is fuzzy *** have shown that AOQ and ATI curves of the plan are like a band having high and low bounds and if the process quality is very good or very bad,then AOQ bands will be lower *** the decreasing the quality of process the bandwidth of FATI will narrower,and with the increasing the size of lot if others parameter be fixed,this width be wider.

关键词： statistical quality control acceptance single sampling average outgoing quality average total inspection fuzzy number.

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