International Journal of Business Marketing and Management (IJBMM) Volume 4 Issue 11 November 2019, P.P. 19-27 ISSN: 2456-4559 www.ijbmm.com International Journal of Business Marketing and Management (IJBMM) Page 19 Over all Equipment Effectiveness (OEE) Measurement Analysis on Gas Power Plant with Analysis of Six Big Losses Dewi Nusraningrum 1 , Edvan Gana Senjaya 2 1 Lecturer, Mercubuana University, Indonesia 2 Alumni, Mercubuana University, Indonesia Abstract: The purpose of this study is to determine the effectiveness of the gas turbine engine work through the value of OEE (availability, performance, quality) and identify losses affecting the OEE value of the gas turbine engine. The method used is a descriptive analysis, which exposes availability, performance and quality of gas turbine engines based on actual data and information by collecting, compiling, classifying and analyzing data and information about the effectiveness of gas turbine engines. The results of the OEE are analyzed using the six big losses method to find the loss factor, root cause analysis using the Fishbone diagram and make improvement recommendations using the 5 why analysis method. Based on the research results, the OEE value of two gas turbine affected by the loss factor which are reduce speed losses, rework losses and breakdown The root of the problem comes from various causes, among others, the setting of the production capacity poorly, the maintenance schedule is still not correct, the operator's competence and knowledge are still lacking, and the technical problems in the gas turbine engines. Keywords: OEE, gas turbine, six big losses, I. INTRODUCTION The power generation industry is an important sector in national development as a provider of electricity for the community, offices and industry. High competition in the manufacturing and service industries, the higher the demand for electricity. Therefore, every company must have continuous improvements in each department to be able to compete (Hermanto, 2016). PT Dian Swastatika Sentosa Tangerang unit is a private company engaged in the supply of electricity and steam where electricity and steam produced are distributed to the paper mill of PT. Indah Kiat Pulp & Paper Tangerang for the process of making paper. In power generation, it has a requirement to produce electricity with the maximum capacity that can be reached and operates in high operational time. Declining power production occurs where the engine breaks down or fails to distribute. One concept that can be used to measure the level of effectiveness of production is the Overall Equipment Effectiveness (OEE) method. Achievement of OEE values is influenced by various factors, namely Availability, Performance, and Quality (Stamatis, 2010: 22).Sal One of the performance values to be achieved by PT DSS is zero unplanned shutdown and zero restriction for electricity and steam production. Figure 1 shows the frequent failures in the electricity and steam production process which is a problem for companies where in 2015 there were 17 breakdowns, 2016 there were 22 breakdowns and 2017 there were 21 breakdowns. Gas turbine engines as the main engine in the process of electricity generation are often breakdown which inhibits the fulfillment of electricity needs and impact to production process of the customer (PT Indah Kiat Tangerang). High loss in electricity production in a gas turbine engine (Figure 2) as a result of damage at the engine and electricity production being unable to achieve the performance value that is zero unplanned shutdown and zero restriction. One way to improve engine performance to be more effective and product quality is to apply the concept of Total Productive Maintenance (TPM) (Boban & Joseph, 2013). In this case the tools used to measure engine performance are by using Overall Equipment Effectiveness (OEE) and six big loses analysis to determine the factors that cause failure (losess) in order to make improvements.