A trolley and insulated box can serve different workflow steps.
Map the flow
Review freezer, ramp, vehicle and handover separately.
Trial together
Check a sample against doors, weight, floor and delivery method.

Compare the trolley and box at their different workflow steps using a sample and route trial.
A trolley can handle internal movement while a box provides route protection; they may also work together. Map the flow from freezer to handover, identify exposed steps, then trial a sample against door dimensions, loaded weight, floor and delivery method.
A trolley and insulated box can serve different workflow steps.
Review freezer, ramp, vehicle and handover separately.
Check a sample against doors, weight, floor and delivery method.
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