Time and Cost Optimization of the Coordinating Ministry 4 Office Building Construction in Nusantara Using the Time-Cost Trade-Off Method

Abstract

This research aims to analyze the acceleration of the construction project for the Coordinating Ministry 4 office building in the Nusantara capital city in terms of cost and time. Additionally, it examines the optimization of the final total cost and project completion time after acceleration. The Time Cost Trade Off (TCTO) method is used to evaluate an acceleration alternative that replaces the construction method with a more effective one. Specifically, the work method for the floor slab structural element is changed from conventional concrete to precast concrete (half-slab). The half-slab method is a type of precast concrete construction for floor slab structural elements. The analysis shows that using the half-slab method as an acceleration alternative was effective for constructing the office building of the Coordinating Ministry 4 in the Nusantara Capital City project, reducing the total work time from 392 days or 56 weeks to 363 days or 52 weeks. The cost also changed, with the normal cost increasing from Rp 29,874,122,004.42 to Rp 29,901,677,798.806, achieving an optimization value of Rp 29,718,483,194.103 and a total time acceleration of 29 days or 4 weeks. These results provide an important overview of the work optimization for improving the future construction management and can serve as a cost-efficiency and time management reference.

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