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Article Dans Une Revue Quality and Reliability Engineering International Année : 2021

Side‐sensitive modified group runs charts with and without measurement errors for monitoring the coefficient of variation

Résumé

The coefficient of variation (CV) is used in process monitoring when the process mean and standard deviation are proportional to each other. In this work, a side-sensitive modified group runs CV (SSMGR CV) chart is proposed for monitoring the process CV. The run length performance of the SSMGR CV chart is compared with those of the existing CV charts in terms of the average and standard deviation of the run length criteria. The SSMGR CV chart is found to outperform the existing CV charts. In addition, the run length performance of the SSMGR CV chart is also evaluated in the presence of measurement errors, as these errors are not only unavoidable in practice but they also affect the sensitivity of a control chart in detecting an out-ofcontrol situation. The results obtained show that the accuracy and precision errors affect the performance of the SSMGR CV chart in detecting an out-of-control situation.
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Dates et versions

hal-03321793 , version 1 (18-08-2021)

Identifiants

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Sajal Saha, Michael B C Khoo, Philippe Castagliola, Abdul Haq. Side‐sensitive modified group runs charts with and without measurement errors for monitoring the coefficient of variation. Quality and Reliability Engineering International, 2021, 37 (2), pp.598-617. ⟨10.1002/qre.2751⟩. ⟨hal-03321793⟩
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