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Others

Mechanical Failure
Human Factors
5%

11%
I & C Failure

51%
20%

13%

Electrical Failure

Fig. 1.9: Classification of Direct Causes of SERs

Human
Others Performance
related-Personnel
work practices
RCA under
progress 5%
13%
Human
Performance
11% 27% related-Procedure
unavailability/
incompleteness/
Equipment related- non-compliance
Maintenance, testing
or surveillance
13%
Equipment
related-Design
Equipment related- 11% configuration &
Specification, 4% 16% analysis
manufacture, storage
and installation
Equipment related-
Ageing

Fig. 1.10: Classification of Root Causes of SERs

AERB Annual Report 2019 33