Time and Optimization Acceleration of Costs in Construction Projects Using the CPM Method (Critical Path Method)

A housing and settlement building project (residential construction), is a housing or settlement development project based on development stages that are simultaneous with the provision of supporting infrastructure. Construction projects have obstacles, including delays in work implementation times and cost overruns. The aim of this research is to analyze the optimal and efficient time duration for housing construction projects using the CPM (Critical Path Method) method. This research uses the Critical Path Method (CPM). The data in this research comes from the work schedule (time schedule) and budget plan made by the management of the Griya Sejahtera Colomadu 2 Housing Development. The data collected was analyzed using the CPM method and then searched for critical work paths/trajectories using a work network. (network planning), after obtaining the maximum time limit, the next job will be accelerated using the Critical Path Method (CPM). Then, for the cost optimization analysis in this research, the acceleration method was used with the alternative of additional labor. Based on the research results, it was found that the Griya Sejahtera Colomadu 2 Housing Development project experienced delays in work implementation times and cost overruns, namely with a total duration of 242 working days, and the normal duration of critical work was 190 working days. The results of the acceleration calculation with the alternative of additional labor have a total duration of 152 days and have a total labor wage cost of IDR 46,993,580.88.