The Improvement of Overhaul Desalination Plant Pltgu Duration in Pt. Pjb up Gresik Using Approach of Lean-Six Sigma Method

Abstract

The Desalination Plant is a unit that processes seawater for raw water for electricity generation. This sea water will be converted into fresh water by using evaporation and condensation systems. Routine maintenance is needed for the readiness, reliability and efficiency of the generator equipment. Therefore an overhaul is needed to restore its performance. One of the problems in the overhaul project is the duration of project implementation that is not as planned. The purpose of this study is to identify Non-Value Added activities as well as the presence of waste that causes the overhaul process to not be completed on time. To identify and reduce waste, researchers use the Lean-Six Sigma method approach (Andarnis & Singgih, 2011; Li, Walton, & Apel, 2007). The Lean method is used to identify and reduce waste that arises while the Six Sigma Method is used to determine the research steps by utilizing DMAIC namely Define, Measure, Analyze, Improve and Control. With the Value Stream mapping method, a new work process design is stated in the form of Future State Mapping (FSM) by eliminating the 4 highest wastes, namely Defects, waiting, Extra processing, Non Utilized Talent. Then the FSM design was simulated with ARENA software. Based on the simulation results of the base model and FSM design, it was shown that the proposed activity improvements could reduce the duration of the desalination plant overhaul from 25.64 days to 22.85 days or 10.88%.