Analysis of Changing Working Patterns on an Overhaul Activity in a Power Plant Industry using Lean Manufacturing Concept

[摘要] East Region Maintenance Service Unit (UPHT) has three main targets to implement maintenance activities, namely on quality, on cost, and on time. These three targets are a form of UPHT commitment in maintaining customer confidence on work result. PT PJB (Bali Java Generation) wants UPHT to optimize the duration of overhaul time. The possible strategy could be applied consists of detailing working breakdown structure (WBS), working in two shifts, roll in - roll out spare parts, and the establishment of a competent quality control team. In this research, value added, non-value added, necessary non-value added, and workload activities were analyzed to optimize quality, duration, profit and minimize budget on project management overhaul gas turbine units. The instrument used in this study were Yamazumi Chart and NASA-Task Load Index (NASA-TLX). The results showed the percentage of value added activity was 38%, necessary non-value added was 51% and non-value added was 11% of the total overhaul. There is the potential to shorten the duration of the major overhaul changes in work schedules from those originally scheduled for 32 days, to only 18 days by using the two-shift pattern. The profit earned from shortening the duration of the overhaul is IDR 2,500,975,763.74.

[发布机构] Department Management of Technology, Institut Teknologi Sepuluh Nopember, Cokroaminoto 12A St, Tegalsari, Surabaya, Indonesia^1

[学科分类] 工业工程学

[关键词] Breakdown structures;Customer confidence;Gas-turbine units;Maintenance activity;Maintenance services;Manufacturing concepts;Value-added activity;Working patterns