Division 2.1.1 Barriers
United Kingdom
The ERCS barrier model consists of 8 barriers, ordered in a logical sequence and weighted as per the following table:
| Barrier number | Barrier | Barrier weight |
|---|---|---|
| 1 | ‘Aircraft, equipment and infrastructure design’, includes maintenance and correction, operation support, the prevention of problems related to technical factors that could lead to an accident. | 5 |
| 2 | ‘Tactical planning’, includes organisational and individual planning prior to the flight or other operational activity that supports the reduction of the causes and contributors to accidents. | 2 |
| 3 | ‘Regulations, procedures, processes’, includes effective, understandable and available regulations, procedures and processes that are complied with (with the exclusion of the use of procedures for recovery barriers). | 3 |
| 4 | ‘Situational awareness and action’, includes human vigilance for operational threats which ensures identification of operational hazards and effective action to prevent an accident. | 2 |
| 5 | ‘Warning systems operation and action’ that could prevent an accident and which are fit for purpose, functioning, operational and are complied with. | 3 |
| 6 | ‘Late recovery from a potential accident situation’ | 1 |
| 7 | ‘Protections’, when an event has occurred, the level of the outcome is mitigated or prevents the escalation of the occurrence by intangible barriers or providence | 1 |
| 8 | ‘Low energy occurrence’ scores the same as ‘Protections’, but for low-energy key risk areas only (ground damage, excursions, injuries). ‘Not applicable’ for all other key risk areas. | 1 |