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Chen, Z, Li, H and Wong, C T C (2000) Environmental Management of Urban Construction Projects in China. Journal of Construction Engineering and Management, 126(04), 320–4.

Crowley, L G (2000) Friedman and Gates—Another Look. Journal of Construction Engineering and Management, 126(04), 306–12.

Drexler, J A and Larson, E W (2000) Partnering: Why Project Owner-Contractor Relationships Change. Journal of Construction Engineering and Management, 126(04), 293–7.

Dunston, P S, Savage, B M and Mannering, F L (2000) Weekend Closure for Construction of Asphalt Overlay on Urban Highway. Journal of Construction Engineering and Management, 126(04), 313–9.

Hiyassat, M A S (2000) Modification of Minimum Moment Approach in Resource Leveling. Journal of Construction Engineering and Management, 126(04), 278–84.

Javid, M and Seneviratne, P N (2000) Investment Risk Analysis in Airport Parking Facility Development. Journal of Construction Engineering and Management, 126(04), 298–305.

Koo, B and Fischer, M (2000) Feasibility Study of 4D CAD in Commercial Construction. Journal of Construction Engineering and Management, 126(04), 251–60.

Maio, C, Schexnayder, C, Knutson, K and Weber, S (2000) Probability Distribution Functions for Construction Simulation. Journal of Construction Engineering and Management, 126(04), 285–92.

Molenaar, K, Washington, S and Diekmann, J (2000) Structural Equation Model of Construction Contract Dispute Potential. Journal of Construction Engineering and Management, 126(04), 268–77.

Thomas, H R (2000) Schedule Acceleration, Work Flow, and Labor Productivity. Journal of Construction Engineering and Management, 126(04), 261–7.

  • Type: Journal Article
  • Keywords:
  • ISBN/ISSN: 0733-9364
  • URL: https://doi.org/10.1061/(ASCE)0733-9364(2000)126:4(261)
  • Abstract:
    This paper details how construction labor efficiency is affected by deviations from the normal flow of work. A methodology is presented to estimate the loss of labor efficiency, based on variations in the percentage of labor hours used each week. The procedure can be used without the need for contractor production records. The theoretical basis for the method rests on the assumption that the rate of manpower utilization is consistent with the amount of work available for the contractor to perform. Using productivity data from three electrical projects that were accelerated, the labor efficiency is shown to be correlated to changes in the percentages of weekly work hours. Loss of efficiency curves are developed for various project phases. A case study is presented of an actual electrical construction project. Losses of efficiency are calculated for each phase, and it is shown that the contractor incurred an estimated loss of productivity of 25%. The analysis is validated by comparing a weekly inefficient work-hour profile to the chronology of events that occurred on the project.