Human Factors Analysis and Classification System HFACS Organizational

Human Factors Analysis and Classification System (HFACS) Organizational Factors Unsafe Supervision Pre. Conditions for Unsafe Acts

Swiss Cheese Model

UNSAFE ACTS Violations Errors Skill-based Errors Decision Errors Perceptual Errors Unsafe Acts Routine Exceptional

PRECONDITIONS FOR UNSAFE ACTS Substandard Practices of Operators Substandard Conditions of Operators Adverse Physiological Mental States Physical/ Mental Limitations Crew Resource Management Preconditions for Unsafe Acts Non-Supervisory Tolerance of Unsafe Acts Personal Readiness

UNSAFE SUPERVISION Unforeseen Unrecognized Hazardous Operations Inadequate Documentation/ Procedures Known Inadequate Supervision Planned Inappropriate Operations Unsafe Supervision Preconditions for Unsafe Acts Failure to Correct Problem Supervisory Violations

ORGANIZATIONAL INFLUENCES Resource Management Organizational Climate Operational Process Organizational Influences Unsafe Supervision Preconditions for Unsafe Acts

Human Factors Analysis Provides More than just an Accident Investigation Tool Organizational Factors Unsafe Supervision Opportunity for Pro -active Action by Management Preconditions for Unsafe Acts Failures in your System’s Defenses Unsafe Acts