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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.

Core Idea

Unsafe supervision is the HFACS layer in which supervisory decisions and omissions create or sustain conditions for unsafe acts. It includes inadequate supervision, inappropriate planned operations, failure to correct known problems, and supervisory violations. A supervisory role has authority over planning, staffing, training, monitoring, correction, or rule enforcement; an exercise or failure of that authority changes the operator's immediate conditions; and a credible pathway connects it to an unsafe act or elevated accident risk.

Scope of Application

Aviation, healthcare, mining, and maritime cases carry the same safety taxonomy, but that is reuse of HFACS across high-risk sectors. Removing supervisory authority and accident causation leaves generic dependency.

Clarity

Organizational influences sit upstream in resources, climate, and process. Preconditions describe operator, team, or environmental states. Unsafe acts are the front-line errors and violations. Generic poor management lacks HFACS's layer and causal routing.

Manages Complexity

The abstraction turns a scattered family of cases into one role-based test: identify the required elements, test their relation, and reject the classification when a constitutive commitment is missing.

Abstract Reasoning

Use the structural signature rather than the label, then challenge the nearest counterexample. A front-line worker's unforeseeable lapse is not unsafe supervision unless a supervisory action or omission helped create the conditions in which it occurred.

Knowledge Transfer

Aviation, healthcare, mining, and maritime cases carry the same safety taxonomy, but that is reuse of HFACS across high-risk sectors. Removing supervisory authority and accident causation leaves generic dependency.

Example

A case qualifies only when the definition and every load-bearing role remain present. A front-line worker's unforeseeable lapse is not unsafe supervision unless a supervisory action or omission helped create the conditions in which it occurred.

Relationships to Other Abstractions

Local relationship map for Unsafe SupervisionParents appear above the current abstraction, mutual partners to the right, and children below. Node labels state whether each abstraction is prime or domain-specific; colors identify relation types.Unsafe SupervisionDOMAINDomain-specific abstraction: Human Factors Analysis and Classification System — is part ofHuman Factors A…DOMAIN

Current abstraction Unsafe Supervision Domain-specific

Foundational — no parent edges in the catalog.

Children (1) — more specific cases that build on this

Not to Be Confused With

Organizational influences sit upstream in resources, climate, and process. Preconditions describe operator, team, or environmental states. Unsafe acts are the front-line errors and violations. Generic poor management lacks HFACS's layer and causal routing.

Notes

(Canonical first draft; queued for Claude house-style re-authoring and citation review.)