The goal of this study is to examine the quality control of the dolomite used as a raw material to make glass sheets. The study was carried out at PT. Muliaglass Float is a business in the industrial sector. The population of this study is the dolomite raw material, which was delivered as 3,764,200 samples and weighed 9,767,500 kilos over three months, with a moisture content of 13.32 percent overall. Six Sigma DMAIC (Define, Measure, Analyze, Improve, Control) and FMEA are used in the analytical process (Failure Mode Effect Analysis). The increase in sigma levels before and after the process has shown that quality control using the Six Sigma approach is a successful strategy for raising the quality of dolomite raw materials. However, due to several factors, including a lack of awareness of the value of quality control and the high expense of maintaining warehouses as a location to keep raw materials, the deployment of the Six Sigma DMAIC and FMEA procedures in the organization has not been performed satisfactorily. The article discusses the ramifications of this research.