ABSTRACT
PT Petrokimia Gresik, a company that accommodates the increasing farmers/agriculturist fertilizer needs, operates a large number of 31 factory units. The operation of the factories must be supported by a good maintenance plan and spare parts stock system. The spare parts stock system is foremost needed because it affects maintenance activities, the value of the company's inventories, carrying costs, and the warehouses’ space availability. This research area aims to analyze the correlation between spare parts planning systems with the level of inventory in the company. The method used in this research is multiple linear regression.
