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SECURITY SOLUTIONS – 17

Human Factors / Minimum Complement Evaluations

The right staffing number is a calculation, not a headcount someone remembers from years ago. GSS sizes minimum complement to the response strategy, with fatigue and shift-pattern effects built in rather than assumed away.

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OPERATIONAL CONTEXT

The right number of people is a calculation, not a headcount someone remembers

Minimum complement is the smallest protective-force staffing level that can execute the response strategy across every shift and posture. It is derived from the response positions and force allocation the timeline analysis requires, not from whatever the site has traditionally staffed.

Human factors are built into that calculation, not treated as a separate concern layered on afterward. Shift rotation, fatigue, and cognitive-load effects are evaluated directly, because a complement that is numerically sufficient but chronically fatigued will not actually perform to the timeline it was sized against.

The determination is re-run whenever the underlying protective strategy, staffing model, or facility configuration changes, and results are documented to support both staffing decisions and licensing-basis submissions.

METHODOLOGY
  1. 01

    Response Requirement Review

    Response positions and force allocation drawn from the response strategy.

  2. 02

    Task & Workload Analysis

    Duties, concurrent-task demands, and shift coverage requirements analyzed per position.

  3. 03

    Fatigue & Shift-Pattern Evaluation

    Shift rotation and fatigue factors evaluated against sustained performance requirements.

  4. 04

    Complement Calculation

    Minimum staffing level calculated to cover all positions and postures across the full schedule.

  5. 05

    Sensitivity Testing

    Complement tested against absence, leave, and contingency scenarios.

  6. 06

    Documentation & Basis Support

    Findings documented to support staffing and licensing-basis decisions.

CORE CAPABILITIES
Response-position workload analysisFatigue & shift-pattern evaluationMinimum-complement calculationContingency & absence sensitivity testingHuman-factors integrationLicensing-basis support
RELEVANT ENVIRONMENTS
Operating nuclear facilitiesSmall modular reactorsOther high-consequence critical infrastructure
FAQ
Is minimum complement just the smallest number that satisfies regulation?No. It's sized to what the response strategy actually requires, with human-factors margin built in, not set at a bare regulatory floor.
How often should this be re-evaluated?Whenever the protective strategy, staffing model, or facility configuration changes, rather than treated as fixed once determined.
Does fatigue really change the calculated number?Yes. Sustained-performance and shift-pattern effects are built directly into the calculation, not addressed as a separate policy question afterward.

Size the complement to the strategy, not the tradition

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