Cost Optimization of Drainage Project Implementation Using the Trade Cost Trade Off (TCTO) Method

Abstract

The development of urban areas is intrinsically linked to the availability of adequate basic infrastructure that supports the social, economic, and environmental functions of a community. Among such infrastructure, drainage systems play a critical role in ensuring the comfort and safety of urban environments. Ponorogo Regency, located in East Java, frequently experiences seasonal flooding and waterlogging, particularly in the areas of Jalan Letjend Suprapto and Jalan Menur. These issues are primarily attributed to insufficient channel capacity, blockages caused by waste accumulation, and inadequate planning in the construction of drainage covers. In response, the local government has undertaken efforts to construct new drainage systems. However, the implementation of these projects often encounters significant financial constraints. Consequently, there is a need to formulate an effective acceleration strategy that maintains a focus on cost efficiency. This study aims to optimize the implementation of drainage construction projects through the application of the Trade Cost Trade Off (TCTO) method, which seeks to achieve a balance between increased project costs and reduced completion time. The analysis was conducted by identifying project activities suitable for acceleration and comparing the cost and duration of the project under normal conditions and after the application of the TCTO method. The results indicate that under normal conditions, indirect costs amounted to Rp.265,594,139.06 and direct costs to Rp.2,390,347,251.56. After implementing the TCTO method and reducing the project duration, direct costs increased to Rp.2,401,108,332.64, while indirect costs decreased to Rp.254,833,057.98. These findings demonstrate that the TCTO method can contribute to overall cost efficiency in accelerated infrastructure projects.