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Criticality Index (CI)
Criticality provides a comparative measure of the relationship between the probability of failure (PoF) and the consequence of failure (CoF) of an asset at a particular point in time.

Consequence of Failure are measured against categories, such as:
  • Network Performance
  • Safety
  • Environmental
  • Financial - opex and capex
The index is used in a criticality analysis.
Scale Index
Criticality Index is a numerical representation of criticality on a defined scaled of C1 to C4
.


Examples
Listed below is an example of a criticality index applied to a group of assets in buildings
  • Roofs        PoF:23 + CoF:84  =  CI:79
  • Boilers      PoF:75 + CoF:54  =  CI:78
  • Carpets     CI = 17
  • Fences     CI = 15

Applications of CI
A criticality index can be used in the following asset management applications:
Combining Health and Criticality to form an Intervention Priority Index.
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Fig. Example of a matrix of the Health Index (HI) against Criticality Index (CI) for various assets.


Risk matrix with highest criticality scores in the zone of maximum risk and decreasing scores as we move down to the bottom left quadrant.
Fig. Risk matrix with highest criticality scores in the zone of maximum risk and decreasing scores as we move down to the bottom left quadrant.

See also:
  • Risk
  • Unbundled Life
  • Criticality Matrix


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