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Related Experiment Videos

Determining fatigue allowances for grocery order selectors.

J Lund1, K S Mericle

  • 1School for Workers, University of Wisconsin-Extension, Madison 53703, USA.

Applied Ergonomics
|March 10, 2000
PubMed
Summary

This study found that four common fatigue allowance worksheets have very low inter-rater reliability and cross-validation. Further research using objective physiological measures of fatigue is recommended for accurate production standards.

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Area of Science:

  • Industrial Engineering
  • Occupational Health
  • Human Factors Engineering

Background:

  • Fatigue allowances are crucial for setting accurate production standards.
  • Existing worksheets for fatigue allowances vary in their methodologies.
  • Objective measures of fatigue are increasingly important in occupational studies.

Purpose of the Study:

  • To compare and contrast four commonly used fatigue allowance worksheets.
  • To examine the factors, weights, and documentation of these worksheets.
  • To assess the reliability and validity of these worksheets in a practical setting.

Main Methods:

  • A literature review of fatigue, including objective physical measures.
  • An experiment involving 11 industrial engineers.

Related Experiment Videos

  • Application of four worksheets to a standardized job analysis and video of a grocery order selector.

    • Main Results:

    • Significant variations were observed in the operational characteristics of the worksheets.
    • Inter-rater reliability among engineers using the worksheets was very low.
    • Cross-validation of the allowances generated by the worksheets was also very low.

    Conclusions:

    • The evaluated fatigue allowance worksheets lack sufficient reliability and validity.
    • Current methods for establishing fatigue allowances may not be robust.
    • Future validation studies should incorporate objective physiological measures of fatigue.