Coal Production Failure Risk Identification Using Fuzzy FMEA (Failure Mode Effect Analysis) at PT Sebuku Tanjung Coal South Kalimantan = Coal Production Failure Risk Identification Using Fuzzy FMEA (Failure Mode Effect Analysis) at PT Sebuku Tanjung Coal South Kalimantan

Economical management is mainly responsible for the increase of revenue or decrease cost including cost production. A failure of production makes mining companies losing which is caused by lack of management or unpredicted/ uncontrolled causes. PT Sebuku Tanjung Coal is a coal mining company placed in Kota Baru, South Kalimantan that has produced moderate-rank coal since 2019. The increase of coal price from December 2020 with $56.65/ton to $75.84/ton on January 2021 drives the company to increase its production rate. To ensure it success, failures should be calculated and reduced. Equipment, water, and pit design are parameters which are used in this research to identify and calculate the risk. This research using FMEA to classify the importance of failure mode with Risk Priority Number (RPN) output. Fuzzy use linguistic technique to assign the failure mode values with membership number with Fuzzy Risk Priority Number (FRPN) output. Classification of the importance rank of failure mode based on RPN shows that low drainage system is the most important failure mode with 320 RPN and based on FRPN it still shows that low drainage system is the most important failure mode with 915 FRPN. A different result might be happen on FRPN cause of linguistic technique.

Keywords : Coal Price, failure mode, RPN, FRPN.