The exact calculation behind every recommendation — no black box.
Foreshelf calculates average daily usage (ADU) per SKU from your order history. Before averaging, outliers are filtered using the IQR method — a one-off promotion does not distort your normal reorder signal.
For each SKU, Foreshelf compares remaining stock, supplier lead time, and velocity to classify the situation into four categories:
A newly received product with no sales is never classified as “dead stock” — there is simply not enough data to judge. Foreshelf waits for a minimum history (30 orders, 60 days) before proposing an automated action (see How Marcus Decides).
As your sales history grows, the velocity estimate converges on your true average — a basic statistical property (the law of large numbers), not an empty marketing promise.