Results 101 to 110 of about 3,958 (193)

MAXIMUM EXPONENTIALLY WEIGHTED MOVING AVERAGE WITH MEASUREMENT ERROR (USING COVARIATE METHOD) USING AUXILIARY INFORMATION FOR CEMENT QUALITY CONTROL

Barekeng
The main quality characteristic at XYZ Inc. that should be observed is Compressive Strength. Cement production quality control is carried out on the average and process variability jointly with the Max-EWMA control chart.
Eirene Christina Sellyra, Muhammad Ahsan, Wibawati Wibawati   +2 more
doaj   +1 more source

EWMA Control Chart Integrated with Time Series Models for COVID-19 Surveillance

Mathematics
The global outbreak of coronavirus disease 2019 (COVID-19) has posed a severe threat to public health and caused widespread socioeconomic disruptions in the past several years. While the pandemic has subsided, it is essential to explore effective disease
Chen-Rui Hsu, Hsiuying Wang
doaj   +1 more source

Individuals charts and additional tests for changes in spread [PDF]

Some authors recommend the use of an additional test for detecting increases in the spread, when using a control chart for individual observations. We examine this recommendation both in a practical situation and theoretically. Both studies show that the
Trip, Albert, Wieringa, Jaap E.
core   +1 more source

An O(Tˆ3) algorithm for the capacitated lot sizing problem with minimum order quantities [PDF]

This paper explores a single-item capacitated lot sizing problem with minimum order quantity, which plays the role of minor set-up cost. We work out the necessary and suffcient solvability conditions and apply the general dynamic programming technique to
Okhrin, Irena, Richter, Knut
core  

edcc : An R Package for the Economic Design of the Control Chart

Journal of Statistical Software, 2013
The basic purpose of the economic design of the control charts is to find the optimum control charts parameters to minimize the process cost. In this paper, an R package, edcc (economic design of control charts), which provides a numerical method to find
Weicheng Zhu, Changsoon Park
doaj  

An Enhanced EWMA Model for Statistical Insights in Process Monitoring with Application in Brake Pad Failure and Carbon Fiber Strength

Journal of Statistical Theory and Applications (JSTA)
Conventional control charts often assume normality, which may not hold for many engineering processes. In cases where processes follow an Inverse Maxwell $$\left( {{\text{IM}}} \right)$$ IM distribution, as seen in various industrial applications, it ...
Muhammad Waqas, Song Hua Xu, Syed Masroor Anwar, Zahid Rasheed, Gilbert Masengo   +4 more
doaj   +1 more source

EWMA CHART BASED ON THE EFFECTIVE VARIANCE FOR MONITORING THE VARIABILITY OF MULTIVARIATE QUALITY CONTROL PROCESS CARTA EWMA CON VARIANZA EFECTIVA PARA MONITOREAR VARIABILIDAD EN PROCESOS DE CONTROL DE CALIDAD MULTIVARIADOS

Revista Colombiana de Estadística, 2008
When it is of interest monitoring small changes in the variability (and/or the mean) of a process, the EWMA control charts have shown to be very efficient.
Morales Víctor Hugo, Vargas José Alberto   +1 more
doaj  

Stein EWMA Control Charts for Count Processes

The monitoring of serially independent or autocorrelated count processes is considered, having a Poisson or (negative) binomial marginal distribution under in-control conditions. Utilizing the corresponding Stein identities, exponentially weighted moving-average (EWMA) control charts are constructed, which can be flexibly adapted to uncover zero ...
openaire   +2 more sources

EATME: An R package for EWMA control charts with adjustments of measurement error. [PDF]

PLoS One
Chen LP, Lin CK.
europepmc   +1 more source

Considering AEWMA control chart applied to Gamma-distributed data with fixed and variable sampling intervals. [PDF]

Sci Rep
Lu SL, Chen MC, Chen JH, Yang SF, Chatterjee K.   +4 more
europepmc   +1 more source