A new approach to design median control charts for location monitoring

Shahid Hussain, Tahir Mahmood*, Muhammad Riaz, Hafiz Zafar Nazir

*Corresponding author for this work

    Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

    11 Citations (Scopus)

    Abstract

    In SPC, the most effective and magnificent tool is the control chart. The structure of control charting schemes required the assumption that the process is free from disturbances with known parameters or correctly estimated from the in-control process. These assumptions need to full fill for monitoring location parameter with mean control charts. But in practical, these assumptions are not always true, due to occasionally presence of outliers. That is why the median is a suitable measure as compared to the mean in the presence of disturbances. The ranked and neoteric ranked set samplings are suggested in this study to monitor the location parameter of the process by using median estimator for CUSUM, EWMA and Shewhart type control charts. The run-length profile is used as a performance measure for proposed median based control charts. The results reveal that for median control charts based on neoteric ranked set sampling scheme yield excellent outcomes. The real-life application is provided of the new charting schemes.
    Original languageEnglish
    Pages (from-to)3553–3577
    JournalCommunications in Statistics - Simulation and Computation
    Volume51
    Issue number7
    Online published3 Feb 2020
    DOIs
    Publication statusPublished - 2022

    Research Keywords

    • Average run length
    • CUSUM
    • EWMA
    • Neoteric ranked set sampling
    • Shewhart chart

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