Table 1.
Severity, Occurrence and Detection rating scale
| Severity | ||
| Rank | Consequence | Description |
| 1 | None | No failure(s) |
| 2 | Minor | Failure(s) associated with results for one inventory |
| 3 | Low | Failure(s) associated with results within one subsystem |
| 4 | Major | Failure(s) associated with results within more than one subsystem |
| 5 | Severe | Failure(s) associated with results throughout the entire life-cycle |
| Occurrence | ||
| Rank | Probability | Description |
| 1 | Very unlikely | Minimal probability of occurrence of failure(s) as a result of force majeure |
| 2 | Unlikely | Occurrence of failure(s) only as a result of misuse of software |
| 3 | Possible | Occurrence of failure(s) only as a result of errors in man-made calculations/estimations |
| 4 | High probability | Occurrence of failure(s) will occur only for certain type of products |
| 5 | Certain | Occurrence of failure(s) in each subsystem of the entire life-cycle |
| Detection | ||
| Rank | Criteria | Description |
| 1 | Very high | Failure(s) associated with results is easily detected |
| 2 | High | Failure(s) associated with results is detected during inventory phase |
| 3 | Low | Failure(s) associated with results is detected during impact assessment phase |
| 4 | Remote | Failure(s) associated with results is detected during interpretation phase |
| 5 | Never | No possibility of identifying failure(s) associated with results of LCA |