Abstract for Optimizing Inventory Supply System

1. OPTIMIZING INVENTORY SUPPLY SYSTEM
AT PT ASIA DEVELOPMENT ENGINEERING
Hanly Anderson
Program Study Industrial Engineering Department Trisakti University
Jl. Kyai Tapa No 1. Jakarta 11440
hanly_anderson@yahoo.co.id
ABSTRACT
One of the problems faced by contractors is problems related to the material supply process.
Inventories of materials is often a disaster because a large amount of supplies caused the cost of
storage and embedded capital grew, while the supply shortage of raw materials caused the
company had run out of goods. Efforts to be organized the process inventories of raw materials
moved at minimizing the cost of supplies but does not reduce the quality of a product that is by
using economic analysis Roder quantity. In a study of the issues discussed are PT ADE has not
planned properly for the material procurement process so that the production process does not
proceed smoothly. Moving on from that then will be counted frequency of purchases of raw
materials made, the total inventory cost of raw materials and limit or point of ordering raw
materials during the grace period. Target to be known is to determine the frequency of purchases
of raw materials and the amount of raw material needs are optimal, knowing the total cost of
inventory companies, know the reorder point (reorder point) of raw materials during the grace
period. This type of research is a case study on PT ADE which research method is a method of
interviews and visual and analytical methods used were analytical determination of inventories by
using the EOQ and safety stock. Estimation method used is expected to be abandoned because of
the weakness. These weaknesses such as the number of reservations, fruekuensi ordering, delivery
time and double work. The advantage is the safety stock when the number of requests
experiencing surges, then the safety stock can be used to cover the request. In applying this
analysis are expected to periodically record every month to know the latest condition of the
material supply. If the supply is still adequate security, no reservations necessary raw material
inventory. Based on the results of calculations can be concluded that the supply of raw materials
each year would have increased supplies of raw materials with a growing company, frequency of
buying raw materials when using the EOQ method is from 5 to 12 times per annum for the period
between ordering from 25 up to 60 days depending of the type of items ordered so that can known
the total cost of raw material inventory. The redomendations is the company should review the
procurement of raw material inventory system that had been done, with the EOQ method,
companies should determine the amount of safety stock and reorder to avoid the risk of running
out of raw materials and also the advantages of raw materials so as to minimize raw material costs
for the company. Companies also need to conduct employee regarding the application of the EOQ.
Keyword: EOQ, ROP, SS, TC
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