Control charts applied to individual sow farm analysis

J. Engler; K.-H. TÃ¶lle; H.H. Timm; E. Hohls; J. Krieter

Control charts applied to individual sow farm analysis

In: Precision Livestock Farming â05

Authors:

J. Engler

J. Engler ¹Institute of Animal Breeding and Husbandry, Christian-Albrechts-University of Kiel Olshausenstr. 40, D-24098 Kiel, Germany
jengler@tierzucht.uni-kiel.de

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K.-H. TÃ¶lle

K.-H. TÃ¶lle ¹Institute of Animal Breeding and Husbandry, Christian-Albrechts-University of Kiel Olshausenstr. 40, D-24098 Kiel, Germany

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H.H. Timm

H.H. Timm ²PIC Deutschland GmbH, Ratsteich 31, D-24837 Schleswig; Germany

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E. Hohls

E. Hohls ²PIC Deutschland GmbH, Ratsteich 31, D-24837 Schleswig; Germany

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, and

J. Krieter

J. Krieter ¹Institute of Animal Breeding and Husbandry, Christian-Albrechts-University of Kiel Olshausenstr. 40, D-24098 Kiel, Germany

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Type:: Chapter

Pages:: 319â325

DOI:: https://doi.org/10.3920/978-90-8686-548-2_040

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The aim of the study was to quickly detect weak elements in pig production using statistical control charts. Two charts were used to detect small deviations: the cumulative sum (CUSUM) control chart and the exponentially weighted moving average (EWMA) control chart. For an optimal design of the EWMA- and the CUSUM-charts a Monte-Carlo-Simulation was performed. The trait considered was piglets born in total. Specific small shifts were implemented to test the performance of the charts. The average time to signal (ATS) and false positive rate (FPR) were taken as classification parameters to evaluate the performance of the charts. All shifts were detected with CUSUM and EWMA control charts. CUSUM showed ATS ranging from 1.3 (FPR= 33.5%) to 8.9 weeks (FPR= 0.2%). In EWMA charts the ATS ranged between 2.0 (FPR= 14.8%) and 7.3 weeks. Both charts are useful tools to trace weak elements in commercial swine farming EWMA is easier to set up and to optimise in online controlling, it enables a clear graphical presentation.

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Precision Livestock Farming â05

E-Book ISBN:: 9789086865482

Publisher:: Wageningen Academic

Print Publication Date:: 10 Oct 2005

Subjects
- Life Sciences
  - General
  - Animal & Veterinary

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Control charts applied to individual sow farm analysis

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Precision Livestock Farming â05

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Precision Livestock Farming â05