PT. Bumi Merapi Energi is a coal mining company that implements an open pit mining system. At the time of the mining process, coal recovery was often not in accordance with the plan. In the period January 2020 to August 2020 the total variation of coal recovery was 88.22%. This figure is below the value of coal recovery PT. Bumi Merapi Energy is 95% with a loss tolerance of 5%, this indicates l…