Safety Science

2 domain-specific abstractions whose origin domain is Safety Science.

• Human Factors Analysis and Classification System — Classify an operational accident through four ordered causal strata— organizational influences, unsafe supervision, preconditions for unsafe acts, and unsafe acts—so investigation climbs past the visible operator error and routes intervention to the layer that generated it.
• Unsafe Supervision — The HFACS stratum in which supervisory planning, correction, and rule- enforcement decisions transmit organizational conditions into the operator's immediate environment and thereby stage unsafe acts.