Wisanka is an indoor and outdoor furniture manufacture and export company in
Indonesia. In the production activities, inventory control of raw materials is very important and
needs to be handled properly so that the production process can run smoothly and orders from
consumers can be fulfilled in a timely manner. Problems faced in the company that there is no
optimal planning in determining the size of ordering of raw materials. Reservations made
during this only based on the quantity of raw materials ordered can meet the needs during a
certain period without considering the total cost incurred. The main purpose of this research is
to determine the policy of controlling raw material requirement for the coming period by
paying attention to the inventory cost incurred. In this research used lot sizing technique based
on Silver Meal algorithm and Wagner Within algorithm. The use of lot sizing technique based
on Wagner Within algorithm resulted in a cost efficiency of 3.6% for klabang material while
Silver Meal of 2.9% for semi-polished rattan and 3.4% for leles compared to the lot sizing
technique applied by the company.