Optimal design of the synthetic control chart for monitoring the multivariate coefficient of variation

KW Khaw, X Chew, WC Yeong, SL Lim - Chemometrics and Intelligent …, 2019 - Elsevier
Control charting techniques have been applied to a wide variety of areas. In certain areas,
such as in finance and healthcare, the process mean and variance are not independent of …

An overview of synthetic‐type control charts: Techniques and methodology

AC Rakitzis, S Chakraborti… - Quality and …, 2019 - Wiley Online Library
In this paper, we provide an overview of a class of control charts called the synthetic charts.
Synthetic charts are a combination of a traditional chart (such as a Shewhart, CUSUM, or …

A synthetic median control chart for monitoring the process mean with measurement errors

PH Tran, KP Tran, A Rakitzis - Quality and Reliability …, 2019 - Wiley Online Library
Recent studies show that the Shewhart median chart is widely used for detecting shifts in a
process, but it is often rather inefficient in detecting small or moderate process shifts. In order …

New distribution-free memory-type control charts based on the Wilcoxon rank-sum statistic

JC Malela-Majika - Quality Technology & Quantitative Management, 2021 - Taylor & Francis
In this paper, a new distribution-free double exponentially weighted moving average
(DEWMA) control chart based on the Wilcoxon rank-sum (WRS) test without any …

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 …

On the performance of Shewhart‐type synthetic and runs‐rules charts combined with an chart

SC Shongwe, MA Graham - Quality and Reliability Engineering …, 2016 - Wiley Online Library
A synthetic chart is a combination of a conforming run‐length chart and an chart, or
equivalently, a 2‐of‐(H+ 1) runs‐rules (RR) chart with a head‐start feature. However, a …

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 …

Side-sensitive synthetic and runs-rules charts for monitoring AR (1) processes with skipping sampling strategies

SC Shongwe, JC Malela-Majika… - … in Statistics-Theory …, 2020 - Taylor & Francis
Side-sensitive Shewhart-type designs have been shown in a variety of process monitoring
contexts to increase the performance of traditional charts when the process observations are …

Some comments regarding the synthetic chart

MAG Machado, AFB Costa - Communications in Statistics-Theory …, 2014 - Taylor & Francis
The steady-state average run length (ARL) is a function of the in-control probabilities of
being in each nonabsorbing state. Davis and Woodall (2002) tabulated values that are …

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 …