Supply of raw materials is the most important thing in the activities of the production process. This study aims to determine whether the scheduling of raw material supply has been running efficiently in order to optimize the time of supply of materials to avoid production delays at PT Tri Jaya tough. This study uses the EOQ method where the scheduling of raw material supply is designed based on the optimal purchase amount, safety stock and is determined by the point where an order or purchase of raw material inventory is made. The results showed that the supply of raw materials at Tri Jaya Tangguh has not been implemented effectively, because the company has not done a good scheduling, the supply of raw materials is only done on the supply of coconut raw materials from suppliers, so the company has not been able to cover the delay in the production process for the raw material inventory. which is not optimal. Thus, the company's production process has not been effective and efficient.