D | Deficiency |
5 | Safety barriers, function and systems nonexistent or unknown. |
4 | Serious deficiencies in existing ones or does not comply with legislation; Needs several improvements. |
3 | Absence and/or some deficiencies in existing ones, respecting part of the law, presents some problems in situations of abnormal operation. |
2 | Sufficient ones but upgradeable, respecting the law, with very few requirements below the established standards. |
1 | Sufficient and well established ones, respecting international standards, above the required by law. |