Het Cumulatieve Som (Cusum) steekproefschema. Een nieuwe controlemethode voor produktieprocessen met een dalend kwaliteitsniveau
Hoogenveen RT Heisterkamp SH
Hoogenveen RT
Heisterkamp SH
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Series / Report no.
Open Access
Type
Report
Language
nl
Date of publication
1991-04-30
Year of publication
Research Projects
Organizational Units
Journal Issue
Title
Het Cumulatieve Som (Cusum) steekproefschema. Een nieuwe controlemethode voor produktieprocessen met een dalend kwaliteitsniveau
Translated Title
The Cumulative Sum (Cusum) quality control scheme. A new control scheme for production processes with a declining quality level
Published in
Abstract
The report starts with an introduction into the Cusum quality control scheme. This scheme is meant to improve the operating characteristic in case of small samples. Therefore the likelihood ratios of some bad parameter value with respect to the good parameter value are being summed up for successive samples. It is shown how to extend the original one-sided univariate Cusum scheme into two-sided and multivariate schemes. A computer program is presented that can be used to fix the parameter values of the Cusum scheme. Finally, information is given on the application of the Cusum scheme within the BCR project for reference materials in water and food microbiology.<br>
Description
Publisher
Rijksinstituut voor Volksgezondheid en Milieu RIVM
Sponsors
RIVM