Operations · Advanced · about 17 minutes

Inventory and demand planning — how much to order and when

You reorder when stock 'looks low'. Sometimes you stock out for three weeks and your listing loses its ranking, which takes two months to recover. Other times you have eleven months of a slow SKU sitting in FBA accruing storage fees.

You need

SKU: insulated lunch box. Daily sales for 8 months (uploaded).

Tool

Excel or code mode

You get

1. DATA ASSESSMENT — Eight months of daily sales is adequate for demand variability but covers only one June–July period, so the seasonal uplift rests on a single observation.

Time saved

Reorder planning from guesswork to a computed decision in about 30 minutes per SKU, and it prevents stockouts that cost weeks of ranking.