On-Site Manpower Increasing Impact on Labor Productivity

  • Published : 2005.10.31

Abstract

During a typical construction project, a contractor nay often find that the time originally available or normally expected to perform its work has been severely reduced. To finish the project by the completion date, the contractor is forced to find a way to speed up the progress of its work to compensate for the reduction in available time. The most frequent initial reaction of contractors to this situation is to increase on-site manpower by working longer time (overtime), adding more workers (overmanning), or implementing shift work (shift work) to increase the rate of progress. The goals of this study were to investigate how these three methods affect labor productivity and to quantify their impact on labor productivity by analyzing real project data collected from sheet metal contractors and mechanical contractors in the US.

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References

  1. Occupational Outlook Handbook, the Bureau of Labor Statistics, U.S., 2002
  2. Brunies R. and Emir, Z. 'Calculating Loss Of Productivity Due To Overtime Using Published Charts: Fact Or Fiction' The Revay report, vol. 20 No.3 Nov. 2001
  3. Coburn, E. 'Shift worker Fatigue: The $77 Billion Problem' Cost Engineering, Vol. 39, No. 04, AACE, 1997
  4. Construction Industry Institute Research report 6-7 'Concepts and Methods of Schedule Compression' Construction Industry Institute, Austin, Texas. 1990
  5. Costa, G.' The impact of shift and night work' Applied Ergonomics, Vol. 27 No.1. 1996
  6. Department of the Army, Corps of Engineers 'Modification Impact Evaluation Guide.' Washington, D.C. 1979
  7. Fly, R. D. 'Why Rotating Shifts Sharply Reduce Productivity.' Supervisory Management, Vol. 25. No. 1. 1980
  8. Hanna et al.'Impact of Change Orders on Labor Efficiency for Electrical Construction' Journal of Construction Engineering Management, ASCE, Vol. 125, No.4, 1999
  9. Horner, R. M. W. and Talhouni, B. T. 'Effects of Accelerated Working, Delays, and Disruptions on Labour Productivity.' 1995
  10. Howerton, J. 'Do You Know the Hidden Costs of Overtime.' Qualified Contractor. 1969. March. 1969
  11. Hung, R.'Improving Productivity and Quality Through Workforce Scheduling.' Industrial Management, Vol. 34, No. 6, 1992
  12. Kossoris, M. 'Hours of Work and Output.' U.S. Department of Labor. Bureau of Labor Statistics. Bulletin No. 917. U.S. Department of Labor. 1947
  13. McGlaun, W. 'Overtime in Construction,' AACE Bulletin, Vol.15 No.5. 1972
  14. Noyce,D.A. and Hanna, A.S.' Planned and Unplanned Schedule Compression: The Impact on Labour' Construction Management and Economics, Vol. 16, No.1. 1998
  15. Penkala, D 'Improving Productivity and Profitability Around the Clock.' National Productivity Review, Vol. 16, No. 3. 1997
  16. Smith, J. 'Extended Overtime and Construction Productivity' AACE Transactions, H.1. 1975
  17. Smith, A. G. 'Increasing Onsite Production.' AACE Transactions. 1987