Dear Josh,

All PMs are approved and planner creates them only after approval. Please see my first posting on 27 Aug 2008 (item-2a):

"... A pre-requisite for PM is that the PM packages should have been approved by Technical Support Division Engineers and should have been configured in CMMS. Once configured, PM orders do not require planning efforts. Scheduling efforts will be, however, needed..."

BTW, your question (and Mike's comments) triggered us to conduct a survey to find out:
a) How many Prev. Maint. Work Orders are manually created by maintenance planners?
b) How many Prev. Maint. Work Orders are created by system?

Finding out the answer was not straight forward; I had to get the help of our CMMS wizard (Frank Gagaring). The historical data for 15 power plants (Eastern Sector) in CMMS for 27 months revealed that:
a) manually created ones are 5%
b) created by system are 95%
It is a very good figure, but not a perfect one! This shows the difference between philosophies & practices.

We also confirmed one of our earlier findings: some power plants are always creating T&I (i.e., Major Preventive Maintenance done during annual Planned Outages) work orders manually instead of using PM program. Recall our discussions on item-2b of my 27 Aug 2008 posting for more on T&I work type.

Dear Vee,

It will take people here some time to get to the level of RCM (to use 'probability of failure' & 'consequences of failure'). Some power plants did not even fill the criticality fields properly (it is another thing that criticality will dynamically change, for example, when standby auxiliary is not available). However, thanks for sharing the concepts & philosophies - will discuss these here for using it to fill 'priority' field

Regards.

This message has been edited. Last edited by: ganesh, v.j,

Well, I don't know how many that 5 % represent. However, once the PM is created by planner, it should become a formal PM program ie. to execute in the future.

This could be part of some "missing or overlook" PM or "seemingly not required PM" during the mass creation of PM upfront, preferably before first production as part of pre-opreational readiness program. This is part of PM change mgmt or continous improvement program by the plants.

Dear Josh, Vee & Mike,
December 2000, Technical Report on ‘Plant Maintenance Optimization Assessment Guideline’ by M. Perakis by EPRI (ELECTRIC POWER RESEARCH INSTITUTE, INC.) Project Manager is an excellent one. My colleague Frank H. Gagaring found this report on the internet. We had earlier come across ERPI article in the POWER Magazine during our survey (see presentation on plant maintenance work types posted earlier)

Following points from different pages of above report are relevant to this forum’s discussions:

a)Corrective Maintenance CM
Early maintenance resources were used to react to equipment breakdowns that caused major
operational losses. From this practice the terms, “reactive”. “breakdown”, “corrective”, and
“run-to-failure” maintenance descriptions were coined for naming the principal maintenance
technique that formed this maintenance strategy. Corrective maintenance can be either good or
bad. For some equipment, such as smaller components that are not critical to production, it is the best technique to use. For others, though, it will result in very high repair costs and excessive lost production. It is one of the techniques that must be appropriately applied in order to develop an optimized maintenance strategy. Experience shows that for fossil plants this approach is predominate

b) There are various categories of corrective Work Orders.
• CM-RTF Run-to-Failure (Pre-planned strategy from RCM analysis)
• CM-CDM Condition-based Maintenance (Work resulting from PM, PDM, PAM)
• CM-CDM-P1&P2 Condition-based Maintenance (Work resulting from PM, PDM, PAM that has
urgent or emergency priority)
• CM-U Unplanned Work

c) Reliability Centered Maintenance (RCM) programs help power producers optimize maintenance basis.

d) There are only four approaches available to identify which maintenance work is to be
accomplished: Preventive (PM), Corrective (CM), Predictive (PDM), and Proactive (PAM); and, all are part of the Maintenance Basis.

Hope the above information is interesting.

Regards.

Do you have the internet link?