PLANNING INVENTORY OF ELECTRICAL COMPONENTS USING PROBABILISTIC MODEL CONTINUOUS REVIEW METHOD AND PERIODIC REVIEW METHOD IN MINIMIZING THE TOTAL INVENTORY COST AT PT. SEA

Abstract

The existing inventory management makes PT. SEA suffer from high inventory cost IDR 21,809,719,718. The combination of ABC/ FSN analysis is used for control the electrical components. The result of ABC analysis is Class A total value IDR 36,040,846,137. Class B has total value IDR 6,851,913,902. Class C has total value IDR 2,267,020,936. Then, for FSN analysis the result is F item has the highest consumption rate with the value 4356.2, S item has a value of consumption rate is 1247, N item has the lowest consumption rate with the value 627.6. The combination of ABC/FSN analysis result nine class that formed which are AF, AS, AN, BF, BS, BN, CF, CS, and CN. The nine class grouped into two main categories, where Category I is AF, AS, AN, BF, and CF. Category II is BS, BN, CS, and CN. The Category I calculated using Continuous Review (s,S) method and Category II use Periodic Review Method (R,S). The results of total cost during 2018 for sample in Category I is IDR 656,723,021 that decreased IDR 286,114,432 or 30.35% from the actual. Sample in Category II using the Periodic Review Method (R,S) the result of total cost is IDR 39,520,660 that decreased by IDR 160,075,803 or 80.19% from the actual.