Criticality assessment for marine diesel engine using failure mode and effect criticality analysis (Fmeca) approach: Case study on lubricating oil system

A marine diesel engine is widely used as prime movers on ships. In order to ensure that the diesel engine works properly, one of the considerations is the condition of the equipment on a supporting system. The equipment should have high reliability, availability, and good performance conditions. The purpose of this research is to assess the criticality of equipment on main engine supporting system, case study on lubricating oil systems. Criticality assessment is used to determine priorities and maintenance actions in maintaining condition of the assets. Maintenance is important to ensure that the condition of the lubrication system is working properly. The proposed method for analyzing is based on the Failure Mode and Effect Criticality Analysis (FMECA) approach using the criticality matrix on American Bureau of Shipping (ABS) Classification. The risk analysis approach has used risk matrix as the basis for plotting criticality from the results of the probability and consequences analysis. The level of criticality is categorized into low, medium, and high risk. Furthermore, the results of FMECA analysis have found out 99 failure mode that caused the equipment of lubricating oil system to fail. The failure modes are categorized into three levels of criticality, low risk 24%, medium risk 64%, and high risk 12%. Based on the highest critical failure mode from a total of 23 equipments, 6 equipments are categorized as low risk, 13 equipments are categorized as medium risk, and 4 equipments are categorized as high risk.