Abstract
Over the last several decades, the scheduling of linear construction projects (LCPs) has been explored extensively by experts. The linear scheduling method (LSM), which focuses on work rate and work continuity, has the advantage of tackling LCPs’ scheduling problems. The traditional LSM uses work continuity to monitor resource allocation continuity on the premise that activities with the same type of work use the same crew. However, some LCPs require a combination of different types of equipment to comprise the crew. Sometimes, parts of different crews require the same types of equipment, and sometimes, the same crew requires different equipment configurations. This causes the pattern of work continuity to be different from the pattern of resource allocation continuity. Therefore, we propose an optimization model of the LSM to minimize idle equipment on a non-sequential linear construction project—i.e., a road network maintenance project. This model is intended to minimize the number of idle equipment and their idle time to achieve more efficient scheduling for linear construction projects. This model offers novel details of resource allocation continuity assessment by taking into account equipment combination and configuration (ECC). Therefore, the scheduling concept used by the proposed model is named the linear scheduling model with ECC (LSM–ECC). The model was developed using constraint programming (CP), as CP has good performance and robustness in the optimization field. The model was implemented to a representation of a road network maintenance project and has satisfactory results.
Highlights
IntroductionA construction project consists of a set of activities related to each other to achieve the project’s objectives [1]
We propose a concept of resource allocation dividing the crew into smaller units—sub-crew—which is called equipment combination and configuration (ECC)
When an activity is completed on a road segment, the crew will carry out the same type of activity on the road segment without having to wait for the entire sequence of activities on the previous road segment to complete
Summary
A construction project consists of a set of activities related to each other to achieve the project’s objectives [1]. Achieving the project’s objectives in the life cycle of the construction project often faces many management problems. One of the prevalent problems is resource availability. Resource management plays an essential factor in project scheduling [2]. Managing resources—equipment, materials, and crews—efficiently in satisfying all project activities becomes an inevitable aspect for construction managers in controlling the project schedule to achieve the project’s goals
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