Shift handover at a chilled distribution warehouse
You manage a 14-person picking team in a chilled distribution warehouse kept at 2°C. The team works two shifts, 06:00–14:00 and 14:00–22:00, with a 15-minute handover overlap. In the last month there have been four near-miss forklift incidents at the shift change, two formal grievances about being ignored by the other shift, and one picker who is deaf in one ear and says the radio earpiece is unusable in the cold store. The handover sheet is often incomplete; supervisors sign it without discussion. Agency staff make up 30% of the team and change weekly. You have no formal authority over the other shift supervisor. Your operations manager wants a quick fix before an audit in three weeks and has refused budget for new radios. What do you do?
1. Using the interaction domain, analyse the interaction factors most likely to be causing the near misses and grievances. Do not just list them; explain the mechanism.
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Start with the handover as a high-risk interaction: two shift groups, different supervisors and a 15-minute overlap create a boundary where equipment and people are moving. The sheet is signed without discussion, so it records completion rather than transferring meaning. That matters because near-miss events cluster at changeover: the incoming shift lacks the previous shift's exceptions, such as a blocked aisle, a damaged pallet or the forklift battery state. The grievances about being ignored suggest low psychological safety between shifts: people do not raise concerns because they expect dismissal, and supervisors model task focus rather than dialogue. Agency staff at 30% and weekly change weaken shared norms and make it harder to know who has been briefed; they are less likely to challenge a supervisor. The deaf picker's unusable earpiece is an inclusion failure: the main channel excludes one person, so safety information is not received and the worker may disengage. The operations manager's quick-fix framing adds pressure to look compliant rather than fix the interaction. Overall, the causes are structural (handover design, channel, staffing) and behavioural (supervisor modelling, cross-shift trust), not simply careless workers.
2. Propose a three-week, no-budget action plan that improves interaction without new radios. Justify each action and say what you would not do.
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Do not buy radios or run a one-off communication briefing; neither changes the handover. Week 1: agree a 10-minute face-to-face huddle at the start of each overlap, chaired alternately by the two supervisors. Use a whiteboard with three columns: safety exceptions, work status, people and equipment issues. The handover sheet becomes the record of the huddle, not a substitute. This transfers meaning and gives agency staff a fixed point to be briefed. Also agree a no-blame question rule: the incoming supervisor must ask one clarifying question. Week 2: assign handover buddies for agency staff and a visual status board at the cold-store door. For the deaf picker, trial a spare vibrating pager or move the earpiece to the better ear after a workplace assessment; do not assume a radio is the only option. Week 3: supervisor coaching on closing the loop, plus a joint review with both shifts. If there is no budget, borrow equipment from stores and use existing noticeboards. Measure huddle attendance, handover exceptions logged and near-miss reports by shift change.
3. How would you measure whether the actions are working, and how would you handle the operations manager's demand for a quick fix?
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Use leading indicators first because near misses are low-frequency: huddle attendance, number of exceptions recorded, agency staff briefed, clarifying questions asked, and observed two-way talk. Lagging indicators: near-miss reports at shift change (an increase may be good if reporting improves), grievances, and a two-question pulse survey on whether people can raise a safety concern at handover. Compare the four weeks before and after and disaggregate by shift. For the manager, reframe the audit risk: an incomplete handover sheet is evidence of a weak control, not a communication problem. Offer a one-shift-pair pilot with a two-week review; this is quicker than a full rollout and gives data. If the manager still insists on a cosmetic fix, put the risk in writing, cite the near misses and the deaf worker's exclusion, and escalate through the safety committee. Do not falsify handover records or pressure staff to sign without discussion.