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NUREG-2199 — IDHEAS-ECA Methodology

Documents IDHEAS-ECA — decomposes operator performance into five macrocognitive functions: detection, understanding, decision-making, action execution, teamwork.

Structure

For each function, defines: cognitive failure modes (CFMs), performance-influencing factors (PIFs) determining CFM activation, and crew-level modifiers.

Why Preferred for AI Extension

  1. Teamwork function already models crew interaction — extends naturally to human-AI teaming
  2. CFM/PIF distinction cleaner than SPAR-H's PSF model — AI-specific failure modes (automation-bias, alert fatigue, mode confusion, reconciliation failure) slot into existing framework
  3. AI-specific PIFs (reliability, trust-calibration, communication quality) extend the PIF framework without restructuring

See hra-methods-compared for cross-method comparison.