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On efficient estimation strategies in monitoring of linear profiles
(
Springer London
, 2018 , Article)
A fundamental strategy to diminish variations in manufacturing process urged the practitioners to characterize the quality of a process by a relationship between the response variable and one or more explanatory variables ...
Multivariate coefficient of variation control charts in phase I of SPC
(
Springer London
, 2018 , Article)
Multivariate control charts are mostly available for monitoring the process mean vector or the covariance matrix. Recently, work has been done on monitoring the multivariate coefficient of variation (CV) in phase II of the ...
Shrinkage estimates of covariance matrices to improve the performance of multivariate cumulative sum control charts
(
Elsevier Ltd
, 2018 , Article)
Multivariate cumulative sum control charts require knowledge of the in-control process covariance parameters. Here, we show that the performance of the multivariate cumulative sum control charts for individual-observation ...
Noise pollution in the hospital environment of a developing country: A case study of Lahore (Pakistan)
(
Taylor and Francis Inc.
, 2018 , Article)
The present study investigates the noise pollution levels in public- and private-sector hospitals of Lahore. The noise pollution parameters were investigated from 20 public and 10 private hospitals. We observed that the ...
On the performance of coefficient of variation control charts in Phase I
(
John Wiley and Sons Ltd
, 2018 , Article)
Control charts are mainly carried out in 2 interconnected phases: Phase I (retrospective phase) and Phase II (monitoring phase). Phase I uses a stable historical sample to establish control limits that will be used later ...