Stochastic Scheduling of Linear Construction Sites

by Joachim Dressler, (A.M.ASCE), Postdoctoral Fellow; Dept. of Civ. Engrg., Stanford Univ., Stanford, CA,

Serial Information: Journal of the Construction Division, 1974, Vol. 100, Issue 4, Pg. 571-587

Document Type: Journal Paper

Abstract: Essential basic data of scheduling linear construction sites are subject to stochastically variable influence factors, e.g., weather conditions. To evaluate economical low-cost alternatives which determine the production sequence of segments of a linear site through a projected construction time, a mathematical model is developed which is formulated as a two-stage stochastic linear programming problem and can be solved by standard linear programming methods. Criteria for interpretation and evaluation of model solutions in terms of a time-velocity diagram are derived and illustrated with a simple example problem. By means of stability analysis, risk factors and probability distributions of project duration and cost can be obtained for different construction alternatives to prepare a final decision. It is emphasized that the methodology presented is not seen as an approach to determine the optimal decision, but rather as a tool to facilitate decision making, since this ultimately relies on practical engineering judgment.

Subject Headings: Construction sites | Linear functions | Stochastic processes | Scheduling | Construction methods | Mathematical models | Computer programming | Risk management |

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