Average annual volume tells a 3PL provider almost nothing about what a seasonal shipper actually needs. The brief that matters is built around worst-case throughput: peak day inbound, peak day outbound, the ratio between them and how quickly the ramp starts. Providers price and resource against what they are told. If the brief understates concentration, the resourcing plan will too.
The gap surfaces at the worst possible moment. Labour allocation, dock scheduling and system capacity are all set before the season starts. A provider who agreed to handle 'up to 4x normal volume' on paper may not have stress-tested what that looks like across a single fortnight with no buffer days and tighter inbound lead times than forecasted.
The structural problem is that most briefing templates are designed for steady-state logistics. Seasonal complexity sits in the shape of demand, not the total quantity. A brief that does not specify daily throughput ceilings, acceptable queue depths and escalation triggers at those ceilings is not describing the real operation.
Building a brief around worst-case assumptions changes the conversation. Providers who cannot resource for the peak self-select out early. Those who remain have been tested against the scenario that actually breaks networks, not the average that makes the annual figures look manageable.
