THE OPTIMIZATION OF SUPPLY FREQUENCY INTERNAL E-KANBAN TO MINIMAZE INTERNAL SUPPLY CHAIN COST AT IMPORT PART

• Main Author: Rinaldi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/50294
• Institution: Institut Teknologi Bandung

E-Kanban is one of the tools used at PT Model to implement Just in Time supply or delivery on time. E-Kanban has the function to calculate orders automatically before production and sends orders by e-mail to suppliers (plan pulling system). The application of E-Kanban does not only cover external functions (parts of orders to suppliers) but also internal functions (parts of supply from stores to production lines). For big parts (using pallets) we use a store which is called a large store, while for small parts that use a small portion we use a box and store in the PC Store. On the actual production floor (in operation) internal E-Kanban is a tool for Timely Inventory implementation (sending parts from the PC Store to the production line). This total internal supply frequency is very important because the use of internal E-Kanban with optimal frequency can minimize delivery cost, storage cost, and eliminate over flow. High delivery frequencies cause expensive delivery costs while low delivery frequencies can cause high storage costs and lead to over flow. At PT Model, the writer needs to develop an appropriate model to find the optimal delivery frequency in the process of delivering parts from PC Store to production. In developing this model, the writer refer to the model developed by Hariga et.al., 2013. The model developed aims to minimize delivery costs by optimizing delivery frequency where the number of boxes or Q is the result of E-Kanban calculations. With shelf capacity constraints and frequency ranges of 2<N<48, the writer uses the Hariga et.al (2013) model to develop an optimization model with delivery frequency decision variables (N) that are appropriate for PT Model. From implementation got frequency optimal is 18 cycle with safety stock one hour. Base on sensitivity test, order frequency 18 cycle valid until 10% volume inrease. If more than, we need to reculculate to keep Just in Time production at PT Model.