Thesis (M.Eng.)--Chulalongkorn University, 2000

This thesis aimed to reduce the delay and unnecessarily accelerated or crashed activities of the project by improving the project control system of an interior decoration company. To reduce the delay and unnecessarily accelerated or crashed activities of the project, the network analysis technique is applied in the proposed project control system. In the proposed project control system, four stages in planning and control the project are introduced in the closed loop feedback control system. They are project planning, project scheduling, resource allocation, and project control. In the proposed project control system, a project management software, Microsoft's Profect 98, is applied in the conbination of the four-mentioned stage to aid calculation and to display the results. After tracking a case study project, it is found that the project delayed from the due date 17 days. And the actual total working time is about 29.29% more than the planed total working time; whereas, the actual total wage cost was estimated to more than the plan by 45.41%. However, these failure results were, partly, because of the limitation of the usage of the proposed project control system caused by three principal causes as follows: 1. The lack of the commitments to the proposed system from the involving groups due to poor communication with the other involving group including the subcontractors and other involving groups, and the low role of the researcher in the case study project. 2. The lack of uncerstand and familiarity with the proposed system of the involving individuals the network analysis, and the computer usage. 3. The lack of studying the project before starting of the company-the site constraints and the details of other activities of other activities of other involving groups. Anyway, the researcher believes that if these limitations mentioned mentioned above are solved and there is the application of the proposed system in the case study project, theoretically, the project will be finished on the due date leading to no paid fine. Moreover, no more project managers will be allocated to the project than expected. As the result, at least, the company will save about bath 160, 400; whereas, the project managers can be allocated to more projects. And the overall working time of the company's subcontractors at the project site will be reduced by 38% from the actual usage leading to the reduction in the total wage 44%.