Types of RCM and its advantages and disadvantages

1-????? Classic RCM

Classic RCM was created based on the research of the MSG Group (Maintenance Steering Group), which is related to the Boeing airline company and its partners, in 1978. In this method, the appropriate maintenance and repair strategy and strategy is determined by identifying the six failure patterns.

2-????? RCM II

Professor JOHN MOUBRAY, who was also a member of the MSG3 research group, with ten years of research (from 1983 to 1992) in 500 companies from different industries in the world and adapting the RCM approach to the conditions governing industrial machines, developed the industrial version of this method under the title of RCM II. introduced industries. In this approach, the FMEA program is used to identify potential failures.

Many companies that implemented RCM in the 1990s listed issues such as the long implementation time of this method and the cost of the work groups involved in the project as challenges ahead, and some also gave up on continuing the work.

The following models are presented in order to solve the shortcomings and existing problems:

3-???? ARCM (Accelerated RCM)

Streamlined RCM or SRCM is an approach that has been put forth as simplifying the RCM implementation and was initially applied in the nuclear industry. This method consists of ―identifying the failure mode that each existing maintenance task is supposed to be preventing and then work forward again through the last three steps of the RCM decision process to re-examine the consequences of each failure and to identify a more cost-effective failure management policy‖. Further this approach concentrates on analyzing critical equipment, critical failures and concentrating on the last 3 steps of the RCM process. SRCM has been criticized for being focused more on maintenance cost optimization rather than on reliability improvement.

4-?? PMO

In the year 2000 AD, Mr. Steve Turner, who is an expert in RCM2, presented a practical method called PM Optimization (PMO2000), which was created based on RCM logic. In this method, RCM steps are implemented for failures that the company is currently dealing with. While in the previous methods, all potential failure modes are identified and checked.

This process, which closely mirrors the classical RCM process, but with a difference in the order of the execution as in SRCM starts with review of existing tasks, and then carries out an analysis of the failure modes as a group rather than individually as done for RCM. The functional analysis which is mandatory in an RCM process is an optional step and the stated aim is to ―generate a list of failure modes from the current maintenance program, an assessment of known failures and by scrutiny of technical documentation. This process too has been criticized for ignoring the function failures and for concentrating on the realization of an effective PM program rather than on overall reliability improvement

?5-????? RCM3

Conventional RCMs have weaknesses in risk and protection functions that have been criticized by users. In this new model, an attempt has been made to fix such defects. RCM3 is an upgraded version of RCM2 that provides more robust and robust results, especially for high-value industries. RCM3 is more compatible with new management systems such as ISO5500 and ISO31000 and is also fully integrated with other management systems such as RBI and HAZOP.

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