~~As maintenance cost is determinant in production cost, maintenance manager should allocate appropriate maintenance that reduces spending. FMEA model “Failure mode, effect and Criticality analysis” is the most useful tool. It combines a theoretical process, experts’ knowledge and historical data of the equipment performances.
This paper proposed a case study based on FMECA’ implementation applied to mining machines (Road-headers AM50) used in cutting, loading rock phosphate and building roadways in underground mining of phosphate.
A survey has been conducted based on five years of performances of these machines. Failures of each compound have been classified by type and range of frequency of occurrence, criticity and degree of detectability. A qualitative survey has been also gathered from maintenance staff. The risk associated with the potential failure modes was calculated through the Risk priority number RPN.
Therefore, data outcome is new maintenance policy that determines worst failure mode and assesses improvement given.