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Detection of changes in time-series of indicators using CUSUMcontrol charts

Published online by Cambridge University Press:  17 June 2009

Benoit Mesnil  and
Pierre Petitgas
Benoit Mesnil
Affiliation:
IFREMER, Département EMH, BP 21105, 44311 Nantes Cedex 3, France
Pierre Petitgas
Affiliation:
IFREMER, Département EMH, BP 21105, 44311 Nantes Cedex 3, France
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Abstract

Statistical Process Control (SPC) methods are extensively used in manufacturing contexts to monitor production processes. This article illustrates their potential utility for monitoring the state of marine ecosystems, using survey indicators. We exemplify the use of one SPC tool, the cumulative sum (CUSUM) control chart, to detect persistent changes in the state of a system as new observations are collected, using simulated and real data. Practical guidelines are given on how the chart parameters can be tuned to achieve an acceptable compromise between the ability to detect anomalies quickly and keeping the risk of false alarms low. The common performance measures associated with control charts depend on some key assumptions being met, and the potential impact of their violation is indicated.

Keywords

Statistical process controlCUSUMAquatic resource monitoring
Type
Research Article
Information
Aquatic Living Resources , Volume 22 , Issue 2: Fish Stock Assessments Using Surveys and Indicators , April 2009 , pp. 187 - 192
Copyright
© EDP Sciences, IFREMER, IRD, 2009

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Supplementary material: File

OLM - alr 22(2) 2009 p.187 - Detection of changes in time-series of ...

Supplemental Material (Electronic-only) - DOI: 10.1051/alr/2008058.olm01

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