Risk Based Maintenance

The RCM Approach is being undertaken on rotating equipment, instrumentation and electrical items, which in nutshell focus on the core maintenance strategy that logically incorporates the optimum mix of reactive, preventive, condition based and proactive maintenance practices, called as the Basic RCM Process, which attempts to answer all of the following seven questions satisfactorily

• What are the functions and associated desired standards of performance of the asset in its present operating context (functions)?
• What ways can it fail to fulfill its functions (functional failures)?
• What causes each functional failure (failure modes)?
• What happens when each failure occurs (failure effects)?
• In what way does each failure matter (failure consequences)?
• What should be done to predict or prevent each failure (proactive tasks and task intervals)?
• What should be done if a suitable proactive task cannot be found (default actions)?

RCM goals and logics

RCM GOALS	RCM LOGICS
Ensure realization of inherent Safety and Reliability and Integrity of the equipment	Determine the function of the system / component
Restore equipment to required levels when deterioration occurs	Define what is a functional failure
Obtain the information necessary for design improvements where inherent reliability is insufficient	Evaluate the consequences of failure
Accomplish these goals at a minimum total life cycle cost	Assign a maintenance task to prevent the failure