Pengendalian Kualitas Produk Cacat Paving DC 06 N dengan Menggunakan Metode Six Sigma di PT. Duta Beton Mandiri Purwosari

Duta Beton Mandiri Purwosari who produces Paving in Purwosari. This company is located in Sawur Village. The initial stage before production must be to prepare the raw materials. One of the raw materials in this process is sand. The sand in this company is experiencing a problem, namely excess raw materials resulting in waste. This MRP method is one of the methods used to reduce both costs and stock. MRP is defined as "A system that creates a production process schedule that is targeted at the raw material data required to produce the company's final product. Lot Size is information regarding the order quantity, order schedule, and the lot sizing technique used. This information is then used by MRP to determine the order quantity. The results of the calculations that have been carried out are: quantity of raw materials = 4000 pcs, raw material costs = Rp. 12,000,000. The results of the MRP method with the Lot for Lot technique are changes in the quantity of raw materials ( cartons) and costs thereby reducing waste, so that the results of the MRP method using the Lot For Lot technique are the number of raw materials = 512 pcs, raw material costs = Rp. 1,536,000. The application of MRP using the lot for lot technique has been proven to be able to increase efficiency, reduce costs and the amount of raw materials ordered so that PT's production process is effective. Duta Beton Mandiri Purwosari can be improved.