1. Introduction
Traditional manufacturing strategy is driven by ‘Push system’ with aimed to keep large of inventory
of product according to customer forecast. However, this has created big problem to people on floor
in dealing with high of WIP inventories, unsynchronized production processes and producing
unnecessary stock. Due to that, established company like Toyota Motor Corporation has moved to next
level of manufacturing approach or strategy by adopting Kanban system [1]. The adoption of kanban
system has improved their efficiency and flexibility of manufacturing according to customer needs.
Kanban system is pull system approach that giving authorization to produce at required rate and at
specific time in order to replenish part
that already consumed by customer [2, 5].