On monitoring process variability under double sampling scheme

S Ahmad, M Riaz, SA Abbasi, Z Lin - International Journal of Production …, 2013 - Elsevier
The presence of variation in all manufacturing and measurement processes is a natural
phenomenon and is the key factor which affects the performance of all types of processes. A …

Canonical variate analysis-based monitoring of process correlation structure using causal feature representation

B Jiang, X Zhu, D Huang, RD Braatz - Journal of Process Control, 2015 - Elsevier
Although the monitoring of process variables has been extensively studied, techniques for
monitoring faults in the process correlation structures have not yet been fully investigated …

Sensitivity enhancing transformations for monitoring the process correlation structure

TJ Rato, MS Reis - Journal of Process Control, 2014 - Elsevier
In this article we address the general problem of monitoring the process cross-and auto-
correlation structure through the incorporation of information about its internal structure in a …

On-line process monitoring using local measures of association: Part I—Detection performance

TJ Rato, MS Reis - Chemometrics and Intelligent Laboratory Systems, 2015 - Elsevier
This article addresses the problem of monitoring on-line the correlation structure of process
variables. Current solutions consist in adopting a moving window approach or an EWMA …

Fault detection and diagnosis strategy based on a weighted and combined index in the residual subspace associated with PCA

C Zhang, X Gao, T Xu, Y Li, Y Pang - Journal of Chemometrics, 2018 - Wiley Online Library
Process monitoring and diagnosis are crucial for efficient and optimal operation of a
chemical plant. Most multivariate statistical process monitoring strategies, such as principal …

Multiscale and megavariate monitoring of the process networked structure: M2NET

TJ Rato, MS Reis - Journal of Chemometrics, 2015 - Wiley Online Library
We present a process monitoring scheme aimed at detecting changes in the networked
structure of process data that is able to handle, simultaneously, three pervasive aspects of …

Non-causal data-driven monitoring of the process correlation structure: A comparison study with new methods

TJ Rato, MS Reis - Computers & chemical engineering, 2014 - Elsevier
Current approaches for monitoring the process correlation structure lag significantly behind
the effectiveness already achieved on the detection of changes in the mean levels of …

[HTML][HTML] Detecting and estimating the time of a step-change in multivariate Poisson processes

STA Niaki, M Khedmati - Scientia Iranica, 2012 - Elsevier
In multi-attribute process monitoring, when a control chart signals an out-of-control condition
indicating the existence of a special cause, knowing when the process has really changed …

Should observations be grouped for effective monitoring of multivariate process variability?

JO Ajadi, IM Zwetsloot - Quality and Reliability Engineering …, 2020 - Wiley Online Library
A multivariate dispersion control chart monitors changes in the process variability of multiple
correlated quality characteristics. In this article, we investigate and compare the performance …

Control estadístico de calidad multivariado, para el monitoreo e identificación de causas de variabilidad en procesos de crédito del sector financiero

PN Pérez Duque - 2012 - repositorio.unal.edu.co
El trabajo de investigación que se presenta como tesis de la Maestría Investigativa en
Ingeniería Industrial, tiene como finalidad crear un modelo de seguimiento de la calidad del …