Peak-Season Fatigue and Mandatory Overtime
You are the safety manager at a 200-person e-commerce fulfilment centre during peak season. Overtime has been mandatory for 3 weeks: 12-hour shifts, 6 days a week, for 140 pickers. Three forklift near misses occurred on the night shift in the last 10 days; one involved a temp worker who had slept 4 hours. A supervisor asks you to approve a one-week extension at the same hours because 22,000 orders are backlogged. One worker has a medical note limiting lifting to 10 kg; another is 7 months pregnant. Turnover among temps is 30% this month. The company has no fatigue policy. The site's incident rate was stable before peak.
1. How do you assess fatigue risk and decide whether to approve the extension?
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Treat the extension as a risk decision, not a scheduling preference. Assess hours worked, commute time, sleep opportunity, night-shift timing, task monotony, physical load, and the near-miss cluster. Three forklift near misses in 10 days, plus a worker who slept 4 hours, are leading indicators of fatigue risk; a stable past incident rate does not offset them. I would not approve the same pattern without controls. A defensible decision could be a shorter extension with caps, at least one rest day, rotation off forklifts after set hours, mandatory breaks, commute support, and daily fatigue checks. If the backlog cannot be met safely, escalate for temporary labour or delayed orders. Record the decision, the criteria, the controls, and the review date. The judgement is whether the residual risk is tolerable with the proposed controls, not whether overtime is generally legal.
2. What accommodations and communication are needed for the worker with the lifting restriction and the pregnant worker?
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Handle both as confidential accommodation cases. For the worker with the 10 kg lifting limit, obtain a functional restriction rather than the diagnosis, review the job demands, and offer temporary modified duties that stay within the limit. For the pregnant worker, assess risks such as prolonged standing, lifting, shift length, and access to rest and toilets; involve her in the solution and obtain medical advice if needed. Do not blanket-exclude either worker or force unpaid leave as the default. Communicate only work restrictions to supervisors, not medical details. Document the accommodation, review date, and the worker's agreement. The judgement point is that peak-season pressure is not a reason to ignore restrictions, and accommodation is not favouritism; it is risk management.
3. What metrics would tell you whether controls are working, and what triggers a stop-work or escalation?
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Use leading and lagging metrics: near-miss reports per 100 hours, overtime hours per worker, fatigue-related errors, forklift speed and horn audits, absenteeism, turnover, and supervisor check completion. Track whether workers report fatigue without fear and whether accommodations are honoured. A stop-work trigger should be predefined: a fatigue-related near miss with serious potential, repeated microsleep reports, a forklift incident, or a cluster of errors on the same shift. Escalation should occur when overtime exceeds the agreed cap, when controls are not being completed, or when the backlog plan depends on sustained 12-hour night shifts. Review weekly, not at the end of peak. The metrics should test control effectiveness, not just count injuries; no injury does not mean the fatigue risk is controlled.