Reliability Centered Maintenance (RCM) is a process that is used for determining overall maintenance in a system so that it can operate effectively in terms of cost, function, production availability, etc. without any failure interruption. It simply helps one to implement maintenance strategy that is both cost and equipment effective. RCM simply assign best maintenance strategies to individual assets so that it can reduce inefficiencies if present. RCM generally focuses on what can happen if root cause of failure is present in system. This simply makes it easier for one to assign appropriate strategy to each asset according to their priority and severity of failure.
Types of RCM :
There are basically two types of RCM techniques available nowadays. Selection of RCM technique is generally based on several factors as given below :
- Failure consequences.
- Probability of failure.
- Risk Tolerance.
- Availability of resources.
- Availability of historical data.
Two types of RCM techniques are as follows :
- Classical RCM :
Classical RCM is also known as Rigorous RCM. In this RCM technique, RCM creates list of all possible failure modes from rigorous assessment of all functions, considering all possible functional failures. After then an assessment of every failure mode that is being related to each functional failure. RCM then further focus on analyzing all possible failure mode on every asset i.e. equipment within system being analyzed. Rigorous RCM is slow process as it analyzes all possible failure modes separately. These techniques require rigorous documentation of functions, function failures, failure modes, failures effects. This approach is time-consuming as well as labor-intensive also. It is function-based approach.
- Abbreviated RCM :
Abbreviated RCM is also known as Intuitive RCM, Streamlined RCM. We know that classical RCM is very time-consuming process and labor-intensive activity. There are various shortened versions of RCM being developed to speed up RCM Analysis or maximize overall value of time required for analysis. Therefore, such streamlined process is known as streamlined RCM techniques. It is a component and condition-based approach that does not require rigorous documentation. It simply considers hierarchical structure of equipment system and saves quarter of total analysis and implementation time. This RCM approach requires at least one individual that have full knowledge and understanding of different condition monitoring technologies.
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