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Fatigue is a critical human factor contributing to increased error rates and incident risks during extended shifts. The supervisor’s first action should be to adjust staffing schedules (B) to balance workloads, reduce excessive hours, and ensure adequate rest periods. Overtime incentives (A) may worsen the problem by encouraging longer hours. More cameras (C) provide observation but do not reduce fatigue itself. Training on end-of-shift hazards (D) is insufficient if systemic workload and fatigue issues remain unaddressed. The STS exam emphasizes supervisors’ role in applying human factors knowledge to safety management, integrating scheduling, job rotation, and workload distribution into hazard controls. Effective approaches may include introducing shorter shifts, implementing fatigue management programs, and ensuring recovery time between shifts. Supervisors must also monitor employee feedback, absenteeism, and productivity to evaluate whether schedule changes reduce risks. Addressing fatigue proactively reflects leadership commitment to both safety and worker well-being.