Field note ·
Slotting in the cold: time, gloves, and door cycles
A perfect golden-zone map fails if every pick requires a door cycle that ices the seal. Cold-store slotting is limited by people and doors as much as by velocity.
Cold-store slotting fails in ways ambient maps do not predict. Gloves reduce dexterity, so piece-pick faces that look reasonable on a drawing become slow once fingers cannot separate inner packs. Door cycles pull warm air; a pick path that sends people in and out for single lines ices the seal and taxes the plant. Time in the chamber is a labour limit as much as a comfort limit.
We treat door discipline as a slotting constraint. Lines that travel together on the same order should live so a picker can stay inside for a full tote, not dart for one SKU. Reserve that feeds those faces should sit where a truck can replenish without holding the door. That often means sacrificing a tidy ABC stripe along the wall in favour of clusters that match how orders actually combine.
PPE and site rules cap how long we will stand in for a study. If your induction allows forty minutes at a time, the walkthrough is forty minutes at a time, with notes written in the anteroom. We will not invent a golden zone that requires an hour of continuous picking if your people are not allowed to stay that long.
If you run mixed temperature, do not copy an ambient map into the cold as a courtesy. The door is part of the layout. Draw it first.