The impracticality of homogeneously weighted moving average and progressive mean control chart approaches

S Knoth, VG Tercero‐Gómez… - Quality and …, 2021 - Wiley Online Library
There is growing literature on new versions of “memory‐type” control charts, where
deceptively good zero‐state average run‐length (ARL) performance is misleading. Using …

Recent advances on univariate distribution-free shewhart-type control charts

MV Koutras, IS Triantafyllou - … for statistical process monitoring and control, 2020 - Springer
In this chapter, we provide an up-to-date overview of nonparametric Shewhart-type
univariate control charts. The monitoring schemes incorporated in the present literature …

An expanded case against synthetic‐type control charts

S Knoth - Quality and Reliability Engineering International, 2022 - Wiley Online Library
During the last two decades, many new methods have appeared in statistical process
monitoring with synthetic‐type control charts being a prominent constituent. These charts …

[HTML][HTML] Monitoring bivariate autocorrelated process using a deep learning-based control chart: A case study on the car manufacturing industry

A Yeganeh, SC Shongwe, AN Ahmadi… - Computers & Industrial …, 2024 - Elsevier
Due to the high frequency of sensor data collection in modern industries, consecutive
observations are potentially autocorrelated. Failing to address this issue adequately when …

Improved Shewhart-type control charts based on weak runs in multistate trials

SD Dafnis, T Perdikis, MV Koutras - Quality Technology & …, 2024 - Taylor & Francis
In this work we introduce two new classes of Shewhart-type control charts with
supplementary runs rules using a three or four region partition of the observed …

On monitoring the process mean of autocorrelated observations with measurement errors using the w‐of‐w runs‐rules scheme

SC Shongwe, JC Malela‐Majika… - Quality and Reliability …, 2020 - Wiley Online Library
Runs‐rules have been widely used since the 1950s in industrial and nonindustrial process
monitoring applications to improve the performance of basic and other traditional monitoring …

Double sampling monitoring schemes: a literature review and some future research ideas

CM Motsepa, JC Malela-Majika… - Communications in …, 2023 - Taylor & Francis
Adapted from the acceptance sampling field, the double sampling monitoring schemes
implement a two-stage strategy to decide whether the process being monitored is in-control …

A side‐sensitive synthetic coefficient of variation chart

WC Yeong, PY Lee, SL Lim, KW Khaw… - Quality and Reliability …, 2021 - Wiley Online Library
Control charts for monitoring the coefficient of variation (γ) are useful for processes with an
inconsistent mean (μ) and a standard deviation (σ) which changes with μ, by monitoring the …

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 …

The new synthetic and runs-rules schemes to monitor the process mean of autocorrelated observations with measurement errors

SC Shongwe, JC Malela-Majika… - … in Statistics-Theory and …, 2021 - Taylor & Francis
The use of the 2-of-(H+ 1) runs-rules and synthetic schemes to improve the performance of
the currently available X¯ schemes in monitoring the process mean under the combined …