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| Subtask | GTT | EPC | HERAT effect | Assessed proportion of effect | Assessed effect |
|---|---|---|---|---|---|
| T2 | 0.0004 | -A shortage of time available for error detection and correction | 11 | 0.263 | (11 − 21) × 0.263) + 1 = 3.63 |
| -Poor, ambiguous or ill-matched system feedback | 4 | 0.400 | (4 − 1) × 0.400) + 1 = 2.2 | ||
| Degrading factor (‘Total EPC effect assessed’) = 3.63 × 2.2 = 7.986 | |||||
| Assessed human error probability = 0.0004 × 7.986 = 3.19E − 03 | |||||
