A hybrid homogeneously weighted moving average control chart for process monitoring: Discussion
JC Malela‐Majika, SC Shongwe… - Quality and Reliability …, 2021 - Wiley Online Library
Quality and Reliability Engineering International, 2021•Wiley Online Library
The sensitivity of a monitoring scheme depends on many factors including the variance of
the charting statistic which is very important in the computation of the control limits. This
paper discusses the computation of the variance of the recently proposed hybrid
homogeneously weighted moving average (HHWMA) X¯ scheme which was based on an
incorrect assumption. The correct variance is used to evaluate the run‐length characteristics
of the HHWMA X¯ scheme. It is observed that the incorrect variance has a significant impact …
the charting statistic which is very important in the computation of the control limits. This
paper discusses the computation of the variance of the recently proposed hybrid
homogeneously weighted moving average (HHWMA) X¯ scheme which was based on an
incorrect assumption. The correct variance is used to evaluate the run‐length characteristics
of the HHWMA X¯ scheme. It is observed that the incorrect variance has a significant impact …
Abstract
The sensitivity of a monitoring scheme depends on many factors including the variance of the charting statistic which is very important in the computation of the control limits. This paper discusses the computation of the variance of the recently proposed hybrid homogeneously weighted moving average (HHWMA) scheme which was based on an incorrect assumption. The correct variance is used to evaluate the run‐length characteristics of the HHWMA scheme. It is observed that the incorrect variance has a significant impact on the sensitivity (or performance) of the HHWMA scheme.
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