A review and critique of auxiliary information-based process monitoring methods

NA Saleh, MA Mahmoud, WH Woodall… - Quality Technology & …, 2023 - Taylor & Francis
We review the rapidly growing literature on auxiliary information-based (AIB) process
monitoring methods. Under this approach, there is an assumption that the auxiliary variable …

A proposed variable parameter control chart for monitoring the multivariate coefficient of variation

XY Chew, MBC Khoo, KW Khaw… - Quality and …, 2019 - Wiley Online Library
An efficient process monitoring system is important for achieving sustainable manufacturing.
The control charting technique is one of the most effective techniques to monitor process …

Optimal CUSUM and adaptive CUSUM charts with auxiliary information for process mean

S Abbasi, A Haq - Journal of Statistical Computation and …, 2019 - Taylor & Francis
The CUSUM chart is good enough to detect small-to-moderate shifts in the process
parameter (s) as it can be optimally designed to detect a particular shift size. The adaptive …

Memory‐type multivariate control charts with auxiliary information for process mean

A Haq, MBC Khoo - Quality and Reliability Engineering …, 2019 - Wiley Online Library
In statistical process control, it is a common practice to increase the sensitivity of a control
chart with the help of an efficient estimator of the underlying process parameter. In this …

Adaptive shewhart control charts under fuzzy parameters with tuned particle swarm optimization algorithm

A Amiri, A Salmasnia, M Zarifi… - Journal of Industrial …, 2023 - World Scientific
In recent years, adaptive control charts in which the design parameters depend on the
observed samples have been successfully used as efficient alternatives for traditional …

An adaptive multivariate EWMA mean chart with variable sample sizes and/or variable sampling intervals

A Haq, MBC Khoo - Quality and Reliability Engineering …, 2022 - Wiley Online Library
New adaptive multivariate EWMA (AME) charts based on the variable sample size (VSS),
variable sampling interval (VSI) and variable sample size and sampling interval (VSSI) …

Probability‐type, Shewhart‐type and EWMA control charts for individual observations from the two‐parameter Lindley distribution

E Demertzi, S Psarakis - Quality and Reliability Engineering …, 2024 - Wiley Online Library
Lindley distribution is a continuous distribution with various applications some of which are
in medicine, genetics, epidemiology, biology, finance and actuarial sciences, ecology …

A combined variable sampling interval and double sampling control chart with auxiliary information for the process mean

AA Umar, MBC Khoo, S Saha… - Transactions of the …, 2020 - journals.sagepub.com
In recent years, the suitable use of auxiliary information technique in control charts has
shown an improved run length performance compared to control charts that do not have this …

[HTML][HTML] A variable sampling interval EWMA t chart with auxiliary information–A robustness study in the presence of estimation error

PS Ng, MBC Khoo, S Saha, MH Lee - Alexandria Engineering Journal, 2022 - Elsevier
This article proposes the variable sampling interval (VSI) exponentially weighted moving
average (EWMA) t chart for the process mean using auxiliary information (AI)(denoted as the …

Improved control charts for phase II monitoring of simple linear profiles using auxiliary information

H Dirbaz, A Amiri, MR Maleki… - Scientia Iranica, 2023 - scientiairanica.sharif.edu
In some manufacturing or non-manufacturing systems, the process outcome is better
characterized by a relationship between a main variable and some associated supporting …