Maintenance Technology September 2016 - 71
10
The RCM process entails asking seven questions
about the asset or system under review,
as follows:
* What are the functions and associated
performance standards of the asset in its
present operating context?
* In what ways does it fail to fulfil its functions?
* What causes each functional failure?
* What happens when each failure occurs?
* In what way does each failure matter?
* What can be done to predict or prevent
each failure?
* What should be done if a suitable preventative
task cannot be found?
The strength of RCM is the way it provides simple,
precise and easily understood criteria for deciding
which (if any) predictive and/or preventative tasks
are technically feasible in any context and if so
for deciding how often they should be done and
who should do them. In addition to a preventative
task's technical feasibility, whether it is worth
doing is governed by how well it deals with the
consequences of the failure. If a preventative task
cannot be found that is both technically feasible
and worth doing, then a suitable default action
must be taken. The essence of the task selections
process is as follows:
* For hidden failures, a predictive and/or
preventative task is worth doing if it reduces
the risk of the multiple failures associated
with that function to a tolerably low level. If
such a task cannot be found, a scheduled failurefinding task must be performed. If a suitable
failure-finding task cannot be found, a secondary
default decision is reached and will require
a redesign.
* For failures with safety or environmental
consequences, a predictive and/or preventative
task is only worth doing if it reduces the risk
of that failure on its own to a very low level,
if it does not eliminate it altogether. If a task
cannot be found that reduces the risk of the
failure to a tolerably low level, the item must be
redesigned or the process must be changed.
* For failures with operational consequences, a
predictive and/or preventative task is only worth
doing if the total cost of doing it, over a period
The strength of
RCM is the way it
provides simple,
precise and easily
understood criteria
for deciding which
(if any) predictive
and/or preventative
tasks are technically
feasible in any
context and if so
for deciding how
often they should
be done and who
should do them.
of time, is less than the cost of the operational
consequences plus the cost of repair over the
same period of time. If this is not met, the initial
default action is no scheduled maintenance
(if this is met and the operational consequences
are still unacceptable then the secondary default
action is to redesign).
* For failures with non-operational consequences,
a predictive and/or preventative task is only
worth doing if the total cost of doing it, over
a period of time, is less the cost of repair
over the same period, otherwise, no schedule
maintenance (if the repair costs are too high the
secondary default action is to possibly redesign).
All too often operations and maintenance
policies lead to practices used for all similar
assets without considering the consequences
of failure in different operating contexts.
This results in large numbers of maintenance
SOLUTIONS AUGUST 2016
10127-4056 SMRP Solutions SE.indd 10
8/22/16 9:43 AM
Table of Contents for the Digital Edition of Maintenance Technology September 2016
Editorial
Uptime
On The Floor
Old-School Approach To New-World Technology
Art Meets Reliability Science
Commit To Safety
Robot-Human Interaction Getting Safer
Sanitary, Stainless Conveyors Not The Same
Reduce Hidden Process-Safety Costs
Pace Your Reliability Program
Win The War With 'Lubrication By Design'
SAP Tips And Tricks
Understand Pump Vibration
Select The Right Relay
Bearing Care
Clear Up HOA Confusion
Potato Waste Becomes Clean Water, Energy
Products
Showcase
Ad Index
Final Thought
Maintenance Technology September 2016 - 1
Maintenance Technology September 2016 - Cover1
Maintenance Technology September 2016 - Cover2
Maintenance Technology September 2016 - 1
Maintenance Technology September 2016 - 2
Maintenance Technology September 2016 - 3
Maintenance Technology September 2016 - Editorial
Maintenance Technology September 2016 - 5
Maintenance Technology September 2016 - Uptime
Maintenance Technology September 2016 - 7
Maintenance Technology September 2016 - On The Floor
Maintenance Technology September 2016 - 9
Maintenance Technology September 2016 - Old-School Approach To New-World Technology
Maintenance Technology September 2016 - 11
Maintenance Technology September 2016 - 12
Maintenance Technology September 2016 - 13
Maintenance Technology September 2016 - 14
Maintenance Technology September 2016 - 15
Maintenance Technology September 2016 - Art Meets Reliability Science
Maintenance Technology September 2016 - 17
Maintenance Technology September 2016 - 18
Maintenance Technology September 2016 - 19
Maintenance Technology September 2016 - Commit To Safety
Maintenance Technology September 2016 - 21
Maintenance Technology September 2016 - 22
Maintenance Technology September 2016 - 23
Maintenance Technology September 2016 - Robot-Human Interaction Getting Safer
Maintenance Technology September 2016 - 25
Maintenance Technology September 2016 - Sanitary, Stainless Conveyors Not The Same
Maintenance Technology September 2016 - 27
Maintenance Technology September 2016 - 28
Maintenance Technology September 2016 - Reduce Hidden Process-Safety Costs
Maintenance Technology September 2016 - 30
Maintenance Technology September 2016 - Pace Your Reliability Program
Maintenance Technology September 2016 - 32
Maintenance Technology September 2016 - 33
Maintenance Technology September 2016 - 34
Maintenance Technology September 2016 - 35
Maintenance Technology September 2016 - Win The War With 'Lubrication By Design'
Maintenance Technology September 2016 - 37
Maintenance Technology September 2016 - 38
Maintenance Technology September 2016 - SAP Tips And Tricks
Maintenance Technology September 2016 - Understand Pump Vibration
Maintenance Technology September 2016 - Select The Right Relay
Maintenance Technology September 2016 - Bearing Care
Maintenance Technology September 2016 - 43
Maintenance Technology September 2016 - Clear Up HOA Confusion
Maintenance Technology September 2016 - Potato Waste Becomes Clean Water, Energy
Maintenance Technology September 2016 - 46
Maintenance Technology September 2016 - 47
Maintenance Technology September 2016 - 48
Maintenance Technology September 2016 - 49
Maintenance Technology September 2016 - 50
Maintenance Technology September 2016 - 51
Maintenance Technology September 2016 - 52
Maintenance Technology September 2016 - Showcase
Maintenance Technology September 2016 - Ad Index
Maintenance Technology September 2016 - 55
Maintenance Technology September 2016 - Final Thought
Maintenance Technology September 2016 - Cover3
Maintenance Technology September 2016 - Cover4
Maintenance Technology September 2016 - 62
Maintenance Technology September 2016 - 63
Maintenance Technology September 2016 - 64
Maintenance Technology September 2016 - 65
Maintenance Technology September 2016 - 66
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