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AbouRizk, S M and Wales, R J (1997) Combined Discrete-Event/Continuous Simulation for Project Planning. Journal of Construction Engineering and Management, 123(01), 11–20.

Crowley, L G (1997) Robust Statistical Estimators for Use within Competitive Bid Data. Journal of Construction Engineering and Management, 123(01), 53–63.

  • Type: Journal Article
  • Keywords:
  • ISBN/ISSN: 0733-9364
  • URL: https://doi.org/10.1061/(ASCE)0733-9364(1997)123:1(53)
  • Abstract:
    Location and scale estimates calculated from project bid data measures the consensus value from among the bidders along with their collective uncertainty about that value. Five robust statistical location and scale estimators are evaluated for their relative performance under competitive bidding conditions-small sample sizes with a high potential for spurious bids. Estimates are made for standard normal samples of three, five, seven, and nine observations using each estimator. Within each sample, one observation is systematically varied in a range of five standard deviations above and below the mean and the other observations are assigned their expected rank-order values. Sensitivity curves are used to illustrate the bias in each estimator caused by the placement of the errant observation. The median and normalized median absolute deviation were found to be the most effective of the five procedures analyzed for location and scale estimators, respectively. Applications of these robust procedures have use in improving legal guidance provided to the courts, enhancing procurement procedures, and providing more accurate bid evaluations. One application describes how robust statistics can be used to reconcile project bids.

Daoud, O E K (1997) The Architect/Engineer's Role in Rehabilitation Work. Journal of Construction Engineering and Management, 123(01), 1–5.

Elazouni, A M (1997) Constructability Improvement of Steel Silos during Field Operations. Journal of Construction Engineering and Management, 123(01), 21–25.

Everett, J G and Farghal, S H (1997) Data Representation for Predicting Performance with Learning Curves. Journal of Construction Engineering and Management, 123(01), 46–52.

Farghal, S H and Everett, J G (1997) Learning Curves: Accuracy in Predicting Future Performance. Journal of Construction Engineering and Management, 123(01), 41–45.

Kangari, R and Miyatake, Y (1997) Developing and Managing Innovative Construction Technologies in Japan. Journal of Construction Engineering and Management, 123(01), 72–78.

Kartam, S, Ballard, G and Ibbs, C W (1997) Introducing a New Concept and Approach to Modeling Construction. Journal of Construction Engineering and Management, 123(01), 89–97.

Mondorf, P E, Kuprenas, J A and Kordahi, E N (1997) Segmental Cantilever Bridge Construction Case Study. Journal of Construction Engineering and Management, 123(01), 79–84.

Russell, J S, Jaselskis, E J and Lawrence, S P (1997) Continuous Assessment of Project Performance. Journal of Construction Engineering and Management, 123(01), 64–71.

Shi, J and AbouRizk, S M (1997) Resource-Based Modeling for Construction Simulation. Journal of Construction Engineering and Management, 123(01), 26–33.

Songer, A D and Molenaar, K R (1997) Project Characteristics for Successful Public-Sector Design-Build. Journal of Construction Engineering and Management, 123(01), 34–40.

Tiong, R L K and Alum, J (1997) Final Negotiation in Competitive BOT Tender. Journal of Construction Engineering and Management, 123(01), 6–10.

Touran, A, Sheahan, T C and Ozcan, E (1997) Rational Equipment Selection Method Based on Soil Conditions. Journal of Construction Engineering and Management, 123(01), 85–88.