Equipment criticality matrix
Score the failure frequency and the consequences of each piece of equipment: the list sorts itself from most to least critical and separates three zones. It is saved in your browser.
| Equipment | Failure frequency | Safety | Environment | Production | Cost | Criticality | |
|---|---|---|---|---|---|---|---|
| 15 · A · High | |||||||
| 12 · B · Medium | |||||||
| 4 · C · Low |
Scale from 1 (minimum) to 5 (maximum) on each criterion. Criticality = frequency × the worst of the four consequences (from 1 to 25). The list is ordered from highest to lowest criticality; the zone cut-offs (A from 15, B from 6 to 14, C up to 5) are a convention of this site, not of the sources: each plant should define its own. The preloaded equipment is made up, only to show the method. What you enter is saved in your browser.
How it works
For each piece of equipment you score, from 1 to 5, the failure frequency and four consequences: safety, environment, production and cost.
- Consequence = the worst of the four. This is the rule from the risk-based inspection example by Meneses Ramírez and colleagues: the consequence of greatest severity defines the class.
- Criticality = frequency × consequence (from 1 to 25), the expression used by Huerta Mendoza.
- The list sorts itself from highest to lowest and each piece of equipment falls into a zone: A from 15, B from 6 to 14 and C up to 5.
The 1 to 5 scales and the zone cut-offs are this site's own judgement: Huerta Mendoza's article uses a criteria table with weights specific to their company. Before scoring, it is worth defining as a team what each number means. What you enter is saved in your browser.
Sources
These are the ones from the article where the theory behind this tool is developed.
Where does the formula come from and what is the list used for? It is in the article Equipment criticality analysis. The equivalent spreadsheet is among the Excel spreadsheets.