World Class Maintenance Management, Terry Wireman, Industrial Press Inc., 1990, pg. 32.
Despite these drawbacks, PM has proven generally reliable in the past and is still
the core of most maintenance programs.
Preventive maintenance traditionally has been the standard maintenance practice
in Reclamation. The maintenance recommendations in this document are based
on a PM philosophy and should be considered as "baseline" practices to be used
when managing a maintenance program.
However, care should be taken in applying preventive maintenance recommenda-
tions. Wholesale implementation of PM recommendations without considering
equipment criticality may result in a workload that is too large to achieve. This
may result in important equipment not receiving needed maintenance, which
defeats the purpose of PM management.
To mitigate this problem, maintenance managers may choose to apply a
consciously chosen, effectively implemented, and properly documented
reliability-centered maintenance (RCM) program.
Whether utilizing a PM or RCM program, the primary focus of the in-house
maintenance staff should be scheduled maintenance.
This will reduce reactive
(emergency and corrective) maintenance. Scheduled maintenance should have
priority over special projects in use of in-house staff.
Reliability-centered maintenance programs are gaining in popularity and have
been piloted in a few Reclamation power facilities with good results. The goal of
these programs is to provide the appropriate amount of maintenance at the right
time to prevent forced outages while at the same time eliminating unnecessary
Implemented properly, RCM can eliminate some of the drawbacks of preventive
maintenance and may result in a more streamlined, efficient maintenance
program. RCM seems very attractive in times of diminishing funding, scarcity of
skilled maintenance staff, and the pressure to "stay on-line" due to electric utility
Some features of RCM are:
May require additional monitoring of quantities like temperature and
vibration to be effective. This may mean new monitoring equipment or more
human monitoring with multiple inspections.
May result in a "run-to-failure" or deferred maintenance philosophy for some
equipment which may cause concern for some staff and managers.