More - What's Maintenance and What's Not!
PAUL D TOMLINGSON
If its equipment and you
do something to keep it running, make it run or make it run better then it’s
maintenance. If its equipment and you modify it or move it, that’s not maintenance.
If you build, construct or install something, you can’t maintain it until it
exists. Wait, there’s more . . .
All equipment is in a
constant state of deterioration. That’s why PM is ‘detection oriented.’ The
idea is to find the problem and fix it before it blows up!
An overhaul can’t be PM
as some think. When an overhaul is required there is so much wrong with the
equipment that it must be removed from service. There is nothing left to
prevent.
Overhauls and rebuilds
are not the same thing. You rebuild the truck engine. And you overhaul the
truck.
If your objective is to
avoid premature equipment failure and extend equipment life, it’s PM.
If the idea is to use
continuous monitoring to asses equipment performance to extend equipment life
and avoid the consequences of failure its Reliability Centered Maintenance
(RCM). And if you are trying to identify the causes of failure and reduce or
eliminate them, you must be able to define reliability. Try this:
Reliability – A measure
of the capability of a unit of production equipment, process or circuit to
operate at designed capacity within its specified operating envelope while adhering
to prescribed maintenance requirements within a designated time period and meet
established levels of product output or service duration.
Other stuff - -
When maintenance has not
determined which work requires planning, bad stuff happens. First, planners are
overcome with processing work orders for jobs that don’t need planning. Then,
by the time the maintenance supervisors are alerted, these small jobs have
become emergency repairs. And, when the planner realizes he has been conned
into ‘the work order administrator’ he has no time left to plan anything.
The term ‘CMMS’ doesn’t
really exist. Few maintenance organizations have a dedicated information
system. Most use a work order system which is part of a fully-integrated system
also used for inventory control, payroll or purchase order tracking all tied to
an accounting. It’s a mystery why other departments think the work order system
is the exclusive means of maintenance work control. If you do work - - of any
kind - - like road grading in the pit - - use the work order system.
The most successful
maintenance managers are those who have figured out that they need help from
other departments and have managed to tell them how!
The best mine or plant
managers are those who recognize that maintenance needs help from other
departments and verifies that they get it.
Operations supervisors
are really diplomats. They must ensure that operators don’t bust the equipment
while trying to find out what maintenance really does and how to get it.
Maintenance craftsmen
are actually ‘frustrated art appreciators’. They know that well-planned work
make their jobs easier and allows them to perform higher quality work.
Maintenance foremen have
the most difficult jobs in industry. No matter who busted the equipment or who
is responsible for the ‘no show’ preceding the sudden failure, it’s their
fault!
In the view of most operations
folks, ‘downtime’ is only a maintenance term.