Page 41 - Machinery Component Maintenance

26 Machinery Component Maintenance and Repair

for eventual installation at all of its plant sites. The modules are made
available to the plants-but not forced upon them. Each plant is en-
couraged to formulate a long-term strategy for use of these systems and
to use the techniques of communication and personnel involvement in im-
plementing systems at its own pace. This modular, but preplanned con-
cept of computer system installation at plant sites permits growth into a
totally integrated system, even if years separate the installation of indi-
vidual systems.

Manuals Prepared
To accomplish the preventive maintenance control system, in a large
multi-plant environment, manuals are prepared by technical specialists
listing the specific maintenance tasks for each equipment item at the op-
erating plants. The manufacturer’s recommendations and a plant’s own
experience are considered in determining the extent of coverage for
maintenance procedures and frequency. Differentiation between running
maintenance and shutdown maintenance is also made. As operating re-
quirements change, these procedures are improved and updated and re-
vised pages are issued to keep the manuals current. A representative PM
manual page is shown in Figure 2-1.
Maintenance tasks range in frequency from daily shifts to several
years, depending on the equipment type, its loading, and serviceability.
Maintenance tasks are monitored by the staff at the home office and
passed through the data processing equipment that performs the follow-
ing functions:

1. Prints schedules and feedback cards.
2. Digests feedback information on completed or rescheduled mainte-
nance.
3. Prints reports showing tasks performed or deferred.
4. Calculates percent compliance.
5. Accumulates actions taken and total time expended.
6. Prints addenda to the schedule and addenda feedback cards for un-
completed tasks.

The percent compliance to the schedule for each plant is separated into
“normal” and “downtime” categories. This separation permits evalua-
tion of thc schedule portion controlled by the plant manager-that por-
tion he can do only during an emergency or planned shutdown. Central
management is thus automatically given the opportunity to pass judge-
ment on the desirability of rescheduling “downtime” PM items. Compli-