1. Hardware | Quality and availability of tools and equipment |
2. Design | Inadequate design leading directly to errors and violations |
3. Maintenance management | Management of maintenance activities |
4. Procedures | Quality, accuracy, relevance, availability and workability of procedures |
5. Error-enforcing conditions | Conditions relating to either the workplace or the individual that can lead to unsafe acts |
6. Housekeeping | Organisational inaction in response to known problems |
7. Incompatible goals | Goal conflicts at the individual, group or organisational level |
8. Communications | Communication problems including absence of communication channels, message failures, reception failures |
9. Organisation | Inadequate organisational structure, organisational responsibilities and management of contractor safety |
10. Training | Inadequate understanding of training requirements, low priority given to training, inadequate definition of competence requirements |
11. Defences | Failures in detection, warning, personnel protection, recovery, containment, escape and rescue |