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Criteria for attributing the score for the Occurrence parame ter
| Score | Class | Description (examples) |
|---|---|---|
| 1–3 | Low | Event that has never occurred and/or is rarely reported in the literature or in benchmarking analyses |
| 4–6 | Medium | Event that has occurred occasionally since starting the activity |
| 7–10 | High | Event that has occurred many times since starting the activity |
