MESH Basic reliability analysis on the work order

Counting the instances of unreliability (i.e. of failure) describes the most basic form of reliability analysis. The RCM tree provides the most elementary portrait of the failure structure of an item. It would seem natural to combine both these sources of knowledge into a single view. That’s exactly what MESH does, every time a maintenance work order is completed.

The article MESH – RCM knowledge continuous improvement described a method for continuous improvement of the RCM knowledge base as new experiences emerge from the work order process.

A second feature of this user interface (UI) displays the reliability in terms of a count associated with each element on the RCM tree view. The count is presented inside “( )”s adjacent to a tree element. The value shown in an upper branch rolls up the instances of failure in the lower branches. In this way the areas of unreliability within the entire equipment are continuously in view, particularly by technicians.

Any observation window

The number of failure instances can be displayed for any calendar window desired, for an entire fleet, or for the current equipment.^[1]

Benefits

With a running view of the reliability at the granularity of the failure mode, the technician can quickly, by right clicking the failure mode leaf of the tree,  judge whether the RCM mitigating task meets the requirements of maintenance as reflected in the RCM effects, and consequences. If an update in the RCM derived strategy related to the failure mode is required, the technician may initiate a continuous improvement procedure as described in the aforementioned article.

© 2015 – 2016, Murray Wiseman. All rights reserved.

1. ^[1]When hour meter or other unit of operating age readings are entered in MESH, or when MESH is connected to the EAM API, the MTTF for each failure mode will also be displayed on the RCM tree.↩