Page 40 - RCM - A practical Guide_V1
P. 40
RCM - A Practical Guide
Task interval selection
Whether the HT task be a restoration or a discard, the method for calculating the task interval is the
same. As previously stated, the interval must be based on the wear out characteristics of the asset
type.
The selection of a suitable task interval will depend on the consequences and organisation for whom
RCM is being applied. As a guide:
Consequence type Interval Rationale Figure
Safety, environmental or < 1/3 or 1/4 of By assigning a frequency at a small fraction of the Figure
other important reason average age of average life, the risk of premature failure is 11
failure minimised.
Other Set just before the By assigning a frequency in line with the age at Figure
age at which there which failure becomes more likely, it maximises 12
is a sharp increase the life of the operational life of the asset while
in CpF minimizing the economic effects.
Figure 11 - HT Task interval calculation example (Safety)
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