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Model of Construction Subcontractors Selection with Time Windows for their Availability

Authors
  • Biruk, S.1
  • Jaskowski, P.1
  • Krzemiński, M.2
  • 1 Faculty of Civil Engineering and Architecture, 20-618 , (Poland)
  • 2 Faculty of Civil Engineering, 00-637 , (Poland)
Type
Published Article
Journal
Archives of Civil Engineering
Publisher
Sciendo
Publication Date
Dec 01, 2019
Volume
65
Issue
4
Pages
295–307
Identifiers
DOI: 10.2478/ace-2019-0061
Source
De Gruyter
Keywords
License
Green

Abstract

Most construction projects involve subcontracting some work packages. A subcontractor is employed on the basis of their bid as well as according to their availability. A viable schedule must account for resource availability constraints. These resources (e.g. crews, subcontractors) engage in many projects, so they become at the disposal for a new project only in certain periods. One of the key tasks of a planner is thus synchronizing the work of resources between concurrent projects. The paper presents a mathematical model of the problem of selecting subcontractors or general contractor’s crews for a time-constrained project that accounts for the availability of contractors, as well as for the cost of subcontracting works. The proposed mixed integer-binary linear programming model enables the user to perform the time/cost trade-off analysis.

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