A hybrid EWMA chart using coefficient of variation

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dc.contributor.authorAslam, M.
dc.contributor.authorGadde, S.
dc.contributor.authorAldosari, M.
dc.contributor.authorJun, C.
dc.date.accessioned2020-03-19T06:15:29Z
dc.date.available2020-03-19T06:15:29Z
dc.date.issued2019
dc.descriptionAbstract. Full Text available at : https://www.emerald.com/insight/search?q=A+hybrid+EWMA+chart+using+coefficient+of+variation&showAll=trueen_US
dc.description.abstractPurpose The purpose of this paper is to develop a new control chart using two EWMA statistics called the hybrid exponentially weighted moving average (HEWMA) chart to improve the sensitivity of EWMA chart proposed by Zhang et al. (2014). When mean and variance of process are not constants, the use of control chart using coefficient of variation (CV) is a successful approach. Design/methodology/approach The control chart using EWMA statistics has ability to detect moderate and small shifts in the process. The authors present the designing of the proposed HEWMA statistics control chart called the HEWMACV chart based on two hybrid EWMA (HEWMA) statistics. The proposed control chart utilizes the current information and previous information to make decision about the state of control chart. Findings In this paper, the authors will present the designing of HEWMA statistics control chart called the HEWMACV chart. The efficiency of the proposed control chart is shown using the simulated data and real data from the industry. The application of proposed chart on the real data shows that the proposed chart has ability to detect shift in the process and it is superior than existing chart in terms of average run length (ARL). Research limitations/implications The design and implementation of the proposed control chart on a real data shows that it can be applied in several industries, such as chemical industry, biological assays, etc. Practical implications The practical application of HEWMA chart using coefficient variation is gaining extensive adequacy. The design and implementation of the HEWMA chart offers a new approach in the detection of small process mean shift. Originality/value In practice, when mean and variance of process are not constants, the use of control chart using CV is a successful approach. In this paper, the authors designed a new control chart using two EWMA statistics called the HEWMA chart to improve the sensitivity of EWMA chart. The comparison shows that the proposed chart is superior than the existing chart in terms of ARL.en_US
dc.identifier.citationAslam, M., Gadde, S. R., Aldosari, M. S., & Jun, C. H. (2019). A hybrid EWMA chart using coefficient of variation. International Journal of Quality & Reliability Management.en_US
dc.identifier.urihttps://doi.org/10.1108/IJQRM-12-2017-0285
dc.identifier.urihttp://hdl.handle.net/20.500.12661/2176
dc.language.isoenen_US
dc.publisherInternational Journal of Quality & Reliability Managementen_US
dc.subjectHybrid exponentially weighted moving averageen_US
dc.subjectExponentially weighted moving averageen_US
dc.subjectHEWMAen_US
dc.subjectEWMAen_US
dc.subjectCoefficient of variationen_US
dc.subjectAverage run lengthen_US
dc.subjectStatistical process controlen_US
dc.subjectExponentially weighted moving average charten_US
dc.titleA hybrid EWMA chart using coefficient of variationen_US
dc.typeArticleen_US
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