Three sites onto one warehouse system, in one weekend
Northgate ran on paper pick lists and a spreadsheet per site. I led the move to one warehouse system: six weeks of slotting and training, a dress rehearsal, then the switch from Friday 22:00 to Sunday 18:00 (sample).
Result. Dock open on Monday at 06:00; picking errors down from 1 in 180 to 1 in 900 (sample).