PERANCANGAN SISTEM KANBAN PEMASOK PADA PT SEMARANG AUTOCOMP MANUFACTURING INDONESIA

Abstract

JIT system has a syncron relation among its supply chains. To realize a syncron JIT system, besides implementing kanban system on production line, kanban system on inventory control is also needed. Kanban system on inventory control called supllier kanban, which is used to withdraw material from supplier -who has a short geographic distance- to manufacturer. Supplier Kanban System was design by considering supply chain management between supplier and the need of fulfillling 100% fill rate of material requirement. There are some variables in designing kanban supplier system which can be analyzed for further researc, such as lot/container size, number of times of conveyance or delivery frequency, safety coefficient, and order frequency which used to see the impact on supplier. Based on inventory control system on the research object, the variable which might undergo further analysis was delivery frequency. Delivery frequency was determined using SSMD (single-setup-multiple-deliveries) model, known as JIT lot-splitting model for supply chain management that was built to minimize total inventory cost aggregate between supplier and manufacturer. Performance measurements on supplier kanban system model were SAMI’s inventory volume, shortage which may occur, order quantity fluctuation, inventory days of supply, and total cost inventory aggregate. The results of supplier kanban system design on SAMI with PASI-AW as supplier showed the decreasing of inventory volume up to 36,61%,, the decreasing of quantity order fluctuation from 48% to 29 %, the decreasing of inventory days of supply from 7 days to 4 days, and the decreasing of total inventory cost aggregate up to 34,82%. Eventhough shortages were estimated occur on the system, this could be anticipated so that the system reached 100% fill rate.