Frequency-consequence matrix for risk evaluation
| Frequency | Risk levels | |||
|---|---|---|---|---|
| Frequent | Undesirable | Intolerable | Intolerable | Intolerable |
| Probable | Tolerable | Undesirable | Intolerable | Intolerable |
| Occasional | Tolerable | Undesirable | Undesirable | Intolerable |
| Remote | Negligible | Tolerable | Undesirable | Undesirable |
| Improbable | Negligible | Negligible | Tolerable | Tolerable |
| Incredible | Negligible | Negligible | Negligible | Negligible |
| Insignificant | Marginal | Critical | Catastrophe | |
| Severity levels of hazard consequence | ||||
| Frequency | Risk levels | |||
|---|---|---|---|---|
| Frequent | Undesirable | Intolerable | Intolerable | Intolerable |
| Probable | Tolerable | Undesirable | Intolerable | Intolerable |
| Occasional | Tolerable | Undesirable | Undesirable | Intolerable |
| Remote | Negligible | Tolerable | Undesirable | Undesirable |
| Improbable | Negligible | Negligible | Tolerable | Tolerable |
| Incredible | Negligible | Negligible | Negligible | Negligible |
| Insignificant | Marginal | Critical | Catastrophe | |
| Severity levels of hazard consequence | ||||
Source(s): Authors' own work
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