PT. Restu Ibu Pusaka is a company engaged in the manufacture of body of bus. The resulting product of this company are various kinds of bus, both buses are large, medium, and small. For each of the results produced by PT. Restu Ibu Pusaka takes some raw materials. In this case the company needs to do the raw materials to be used in the production process. Because without materials, then the continuity of the production process will be hampered.
Problems faced by PT. Restu Ibu Pusaka is a company often have excess raw materials, this occurs because the company underestimated the number of optimal ordering of raw materials right at the time of booking and the company does not consider the maximum amount of raw material during storage. The purpose of this study is to determine the optimum amount of raw materials upon booking and calculate the maximum amount of raw material in storage, thus increasing the profit of the company. This research uses four types of methods, the method of P, Q Method, Quantity Discount Method, and Method of Minimal Order.Based on the calculation, for raw materials bought from suppliers who sets the minimum order, total cost for one year the smallest there are on method P, Rp 10.346.099.316. For raw materials bought from suppliers who gives discount total cost for one year the smallest there are on method quantity the discount, Rp 2.550.539.802. For raw materials bought from suppliers which give no discount and at minimum order, total cost for one year the smallest there are on method P,Rp 7.691.305.429. |