Assessing Time Cost Trade-off of Construction Projects

[[abstract]]工程專案之工作範圍、預定進度時程、預算為專案主要組成份子。工作範圍明確的定義、合理的工期及預算皆為專案成功與否的關鍵因素，過去已有許多有關專案工期與成本之研究，且已有相當之成果。過去之研究可分為兩部份，一部份著重於固定工期上資源配置、整平、資源最佳化利用，另一部分則著重於時間-成本之互易。然而，前者多專注在單一資源之配置整平，後者則以各工項作業之時間-成本互易關係推估專案整體時間與成本之關係。顯少就專案整體資源之配置整合，未深究工項作業之時間成本互易關係，係基於使用資源用量及資源效率之改變及其可能對整體資源配置及成本之影響。本研究企圖以資源整合最佳化模式為基礎，探求成本最低之最佳工期並確認時間與成本之互易關係。[[abstract]]Work scope、budget、and schedule are three main components of a construction project. A clear defined work scope, an acceptable and reasonable budget, and a reasonable schedule with detailed and logic work sequences are critical factors for the success of construction projects. Many studies have been made on the areas of project duration and costs; some are made on the resource allocation/leveling within fixed project duration, and some on the time cost trade-off. However, most of the former studies are focused on the allocation/leveling of a single resource and the latter are analyzed merely based on the time cost trade-off of each individual activity. Few have considered the optimal quantity and the efficiency of the resource for a specific task and the integration of the overall project resources while simulating the time cost trade-off the potential effect on and the construction costs. Based on the resource optimization model established in the previous research, this research aims to identify the project duration with the lowest resource costs and depict the time cost trade-off relationships through integrating the overall project resources.[[note]]NSC99-2221-E327-03