Ninety days sounds like a lot of runway. It isn't. Not if you're running a mid-size e-commerce fulfillment operation where Q4 might mean going from 1,200 orders a day to 4,500, where your temp agency needs six weeks of lead time on trained headcount, and where a slot configuration that worked fine in August will completely fall apart when your top 40 SKUs shift in November. The first thing most teams get wrong is treating peak prep as a checklist they run through once. It's n