137 TIME ACCELERATION ANALYSIS AND OPTIMAL COST OF HOSPITAL HOSPITAL DEVELOPMENT PROJECT ON SHIP BUILDING USING CRITICAL PATH METHOD (CASE STUDY: PT. PAL INDONESIA (PERSERO)) Agung Tresnadi 1 , Suparno 2 , Sutrisno 3 , Wawan Kusdiana 4 1,3,4 Indonesian Naval Technology College, STTAL, Surabaya, Indonesia ²Industrial Engineering Department, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia e-mail: agung.tresnadiasro@gmail.com ABSTRACT Hospital Auxiliary Ship is an Indonesian Navy ship produced by PT. PAL Indonesia (Persero). The construction of this BRS ship was very time consuming and one of the main parts of the ship building project was the construction of the hull structure. In relation to time and production costs, the shipyard must be as efficient as possible in the use of time in each activity or activity, so that costs can be minimized from the original plan. Acceleration of the total duration in a project is done by accelerating critical activities in the project. To find out which are the critical activities of a project, the Critical Path Method (CPM) technique is used; namely by drawing a Network Diagram of the project. By using the CPM method in scheduling a ship hull construction project, it can be seen which activities should take precedence so as not to experience delays and waste. After that, the crashing method is carried out by increasing work hours (overtime) which aims to speed up the time of the project. The results of research for activities that are in the initial critical path with the CPM method can be seen as activities A, C, H, M, R, W, AB, AC, AD, AI, AP, AT, BA, BJ, BN. After accelerating, the critical path activities include activities A, C, H, M, R, W, X, AC, AD, AI, AP, AT, BA, BH, BO. Calculation of the project during initial conditions with Early working days without using overtime hours PT PAL Indonesia (Persero) costs Rp. 5,299,631,000, - while the Crashing Method is through the addition of 1 hour / day overtime so that the project implementation can be accelerated from the initial implementation of 450 days to 412 days and PT. PAL Indonesia (Persero) issued a project cost of Rp. 5,323,752,480, -. Keywords: Hospital Support Ship, Scheduling, CPM, Crashing. 1. INTRODUCTION. PT PAL Indonesia as one of the strategic industries that produces the main tool of the Indonesian defence system, especially for the marine dimension, certainly has an important and strategic role in supporting development of the national marine industry. In the other hand, Indonesia, the largest archipelagic state in the world, consists of oceans covering two-thirds of Indonesia's territory. Also, Indonesia is one of the countries with the longest coastline in the world. As a maritime country, Indonesia's geographical position lies in the tropics, in a crossing between two continents (Asia and Australia) and two oceans (Indian and the Pacific Ocean), and it has the potential and opportunities for the development of the marine industry to become national economic strength. Indonesia as a maritime country continues to develop and upgrade the fleet sea with good additions the number and type of combat fleet as well supporting fleet. This is confirmed through Law Number 34 of 2004 about the roles and duties of the Indonesian Navy in Article 9 that the TNI has duties and responsibility to build and develop the strength of the marine dimension aims to enforce the law and maintain security and territorial sovereignty sea following national laws and laws which has been ratified. The construction of this ship takes a long time in one part of the shipbuilding project. The difficulties are in the electrical system which was going to be combined in erections, so planning is essential to control the work so that time efficiency occurs. PT. PAL Indonesia (Persero) as an international standard shipbuilding company is required to be able to meet the effective completion time in building new ships to be able to complete the next project with better results than the previous project. Cases of project delays at shipyard companies are usually caused by various factors, such as delays in materials, human resources, and equipment facilities. If there are material obstacles or human resources problems in the production process, each activity is less effective and it could cause delay of the completion, resulting in the emergence of a critical trajectory on the activities in the ship's electrical system. If those problems happen, there will be a lot of excess in some parts of the production. This in turn will cause an increase in production expenditures or delay in completion of production, consequently results in large losses to the shipyard industry. To support its International Journal of ASRO Volume 12, Number 01, pp. 137-145 Jan 2021