IMPROVEMENT OF SERGAP CONSUMABLE MATERIALS INVENTORY MANAGEMENT IN COMMUNITY WAREHOUSE PT BADAK NGL

• Main Author: Chandra Frayekti, Melly
• Format: Theses
• Language: Indonesia
• Subjects: Manajemen umum
• Online Access: https://digilib.itb.ac.id/gdl/view/77180
• Institution: Institut Teknologi Bandung

Housing Facility is one of supporting facilities in PT Badak NGL sites. This facility is maintained under General Support function. Maintenance activities consist of preventive & predictive maintenance, reactive maintenance and responsive maintenance. Which responsive maintenance is conducted by SERGAP, one of work unit under General Support. Material used by SERGAP to conduct minim repair in housing facility is provided by Community Warehouse. Maintenance by SERGAP often delayed due to out-of-stock material. Another impact of material stockout are the increasing cost of work order scheme and decreasing customer satisfaction. Through fishbone diagram analysis defined that there are three root causes of the problem, there are lack of knowledge, no standard operating procedures as the company policy and no controlling process of inventory control to maintain the record accuracy of material. Fixed-time period model is chosen as the most appropriate method based on several considerations such as period of inventory check, variety items, procurement technical methods, and the number of orders vary in each purchase. Service level expected of not stocking out material is 99% which is the value of service factor (z) equal 2,33. ABC classification method is conducted to 127 items of consumable material which category consist of plumbing, AC, electrical, and civil. Based on the ABC classification there are 26 items in class A (80% from total dollar value), 30 items in class B (15% from total dollar value) and 71 items in class C (5% from total dollar value). From 127 items consumable material of SERGAP compare with its average inventory level, so it can be concluded that 24 items are overstock, 58 items are understock, and 45 items are in sufficient stock. This study resulted that total potential costs saving through implementing the inventory management are $36.019,17. So, it is very important to keep the on-hand quantity in sufficient level stock.