Calculation of Human Error Probability - 2
Calculation of Human Error Probability - 2
THERP (Cont.)
- In the diagram, a capital letter is a correct outcome and a small letter is an erroneous action.
- The | symbol indicates a conditional probability.
- Apply to starting a car.
- K = correct key
- k = incorrect key
- S = getting key into ignition
- s = missing ignition
- P(S|K) is probability of getting key into ignition, given getting correct key. This is the only correct outcome.
- P(error) = 1-P(S|K)