Results 91 to 100 of about 1,881 (223)

EWMA Chart and Measurement Error

Measurement error is a usually met distortion factor in real-world applications that influences the outcome of a process. In this paper, we examine the effect of measurement error on the ability of the EWMA control chart to detect out-of-control ...
Panaretos, John, Maravelakis, Petros, Psarakis, Stelios   +2 more
core  

Constructing a fuzzy Shewhart control chart for variables when uncertainty and randomness are combined

, 2010
peer reviewedIn this paper we introduce a fuzzy chart for variables which is used in situations when uncertainty and randomness are combined. It is showed that the Shewhart chart’s control limits must be adjusted in these situations.
Aliasghar Bazdar, M. Moghadam, Faraz, Alireza, Moghadam, M. B., BAZDAR, A., Kazemzadeh, R. B., R. Kazemzadeh, Alireza Faraz   +7 more
core   +1 more source

Use of the CUSUM and Shewhart control chart methods to identify changes of public health significance using childhood blood lead surveillance data. [PDF]

Environ Epidemiol, 2020
Dignam T, Hodge J, Chuke S, Mercado C, Ettinger AS, Flanders WD.   +5 more
europepmc   +1 more source

Control Charts and the Effect of the Two-Component Measurement Error Model

Monitoring algorithms, such as the Shewhart and Cusum control charts, are often used for monitoring purposes in the chemical industry or within an environmental context.
Michele Scagliarini, Daniela Cocchi
core  

The Fixed v. Variable Sampling Interval Shewhart X-Bar Control Chart in the Presence of Positively Autocorrelated Data [PDF]

, 1993
This study uses simulation to examine differences between fixed sampling interval (FSI) and variable sampling interval (VSI) Shewhart X-bar control charts for processes that produce positively autocorrelated data.
Harvey, Martha M. (Martha Mattern)
core  

On Monitoring of the Shape Parameter of the Inverse Gaussian Distribution via Memoryless Chart Under Bayesian Setup

IEEE Access
The Inverse Gaussian distribution (IGD) is a probability distribution with several applications in various fields. The proposed study is prone to consider the problem of monitoring the shape parameter of IGD using the Bayesian method.
Tahir Abbas, Amara Javed, Nasir Abbas, Muhammad Abid   +3 more
doaj   +1 more source

A Computer Program to Calculate Two-Stage Short-Run Control Chart Factors for (X,MR) Charts

This paper is the second in a series of two papers that fully develops two-stage short-run (X, MR) control charts. This paper describes the development and execution of a computer program that accurately calculates first- and second-stage short-run ...
Kenneth E. Case, Matthew E. Elam
core  

Statistical and economic design of regression control chart : a comparative study with Shewhart control chart [PDF]

, 2011
LAUREA MAGISTRALEStatistical process control is one of the greatest technological developments of twentieth century because it is easy to use, based on sound principles, has significant impact and is flexible.
NALAWADE, ARCHANA VINAYAK
core  

A dispersion control chart

, 2008
The study proposes a Shewhart-type control chart, namely Q chart, based on inter-quartile range, for monitoring changes (especially of moderate and large amounts which is major concern of Shewhart-type control charts) in process dispersion assuming ...
Riaz, M.
core   +1 more source

SYSTEM DESIGN AND BEHAVIOR OF PATTERN RECOGNITION OF CONTROL CHART USING NEURAL NETWORK

Jurnal Teknik Industri, 2003
Recognition of unnatural patterns in control charts is important to get more understanding about the process problem. Shewhart control chart can recognize shift pattern only, while the others cannot be detected by this chart.
Justin Yulius Halim
doaj