Multivariate time-between-events monitoring: an overview and some overlooked underlying complexities

IM Zwetsloot, T Mahmood, WH Woodall - Quality Engineering, 2020 - Taylor & Francis
We review methods for monitoring multivariate time-between-events (TBE) data. We present
some underlying complexities that have been overlooked in the literature. It is helpful to …

An improved process monitoring by mixed multivariate memory control charts: An application in wind turbine field

B Zaman, MH Lee, M Riaz - Computers & Industrial Engineering, 2020 - Elsevier
Memory control chart such as multivariate CUSUM (MCUSUM) and multivariate EWMA
(MEWMA) control charts are considered superior for the detection of small-to-moderate …

Copula-based CUSUM charts for monitoring infectious disease using Markovian Poisson processes

C Wu, S Si, W Huang, W Jiang - Computers & Industrial Engineering, 2022 - Elsevier
The manuscript addresses the copula-based CUSUM charting scheme to monitor infectious
disease. To facilitate the disease surveillance, the Poisson distribution is often used to …

Optimal monitoring of Poisson data with known and unknown shifts

J Wang, ZL Chong, P Qiu - Computers & Industrial Engineering, 2021 - Elsevier
The number of event occurrences, called counts are prevalent in many fields such as
manufacturing industry and public health. Control charts have been widely employed to …

Change-Point detection for autocorrelated multivariate Poisson processes

Z Wang, Z He, Y Shang, Y Ma - Quality Technology & Quantitative …, 2023 - Taylor & Francis
Statistical process control for count data has attracted increasing attention in recent years.
The need for efficient control charts suitable for autocorrelated multivariate count processes …

Robust T2 control chart using median‐based estimators

F Maleki, S Mehri, A Aghaie… - Quality and Reliability …, 2020 - Wiley Online Library
One of the most widely used multivariate control charts is the Hotelling T2. In order to
construct a Hotelling T2 control chart, the mean vector (μ) and the variance–covariance …

A simple test to determine the contributors of fraction nonconforming shifts in a multivariate binomial process

CD Hou - Quality Engineering, 2023 - Taylor & Francis
The fraction nonconforming, which follows a binomial distribution, is one of the most critical
quality characteristics of attribute processes. In addition, the multivariate binomial process …

[HTML][HTML] Optimal Design of One-Sided Exponential Adaptive EWMA Scheme Based on Median Run Length

Y Qiao, Z Wu, Q Zhang, Q Xu, G Jin - Algorithms, 2024 - mdpi.com
High-quality processes, characterized by low defect rates, typically exhibit an exponential
distribution for time-between-events (TBE) data. To effectively monitor TBE data, one-sided …

Two approaches to monitoring multivariate Poisson counts: Simple and accurate

K Bai, J Li, D Ding - IISE Transactions, 2024 - Taylor & Francis
We consider the monitoring of multivariate correlated count data, which have many
applications in practice. Although there are quite a few methods for the statistical process …

[HTML][HTML] An Outlier Detection Approach to Recognize the Sources of a Process Failure within a Multivariate Poisson Process

CD Hou, RH Su - Mathematics, 2024 - mdpi.com
Among attribute processes, the number of nonconformities conforming to a Poisson
distribution is among the most crucial quality attributes. Furthermore, owing to the variety of …