Quick answer
SKU-level demand forecasting projects sales for each individual product (each SKU) rather than the brand as a whole. Because you buy, hold, and stock out at the SKU level, forecasting there is what makes a demand plan actionable: it tells you exactly how many of each item to order and when, instead of an aggregate you cannot purchase against.
You cannot buy an aggregate
A total revenue forecast is useful for finance, but you cannot place a purchase order for total revenue. You order specific SKUs in specific quantities. SKU-level forecasting brings the forecast down to the unit of decision, so it drives real purchasing instead of sitting one level too high to act on.
Why SKU detail changes the answer
Aggregate forecasts hide the mix. Two brands with identical total sales can need completely different inventory if one sells a few hero SKUs and the other spreads across many. SKU-level forecasting captures which items are accelerating, which are fading, and which are seasonal, so you buy to the real shape of demand.
- Hero SKUs. Forecast tightly; a stockout here costs the most.
- Long-tail SKUs. Avoid over-buying items that move slowly.
- Seasonal SKUs. Time purchases to the demand curve.
- New launches. Forecast without history, then learn fast.
Rule of thumb. Forecast at the level you purchase. If you buy by SKU, forecast by SKU, then roll up to the financial plan, not the other way around.
Where Drivepoint fits. Drivepoint supports SKU-level demand forecasting connected to inventory and cash, so item-level demand rolls up into the financial model and drives fundable purchase orders.