What’s the expected accuracy (MAPE) I should target?

It depends on the SKU. For fast-mover, low-variance SKUs (consistent daily demand > 5 units): target 8-12% MAPE. Achievable. For typical mid-velocity SKUs (1-5 units/day): 12-18% MAPE is realistic and operationally useful. For slow-movers (< 1 unit/day, lumpy demand): MAPE is a bad metric, use intermittent-demand metrics like Croston’s method or just classify into a manual reorder bucket. As a rule of thumb: if your overall portfolio MAPE is under 15% across your top 80% of revenue, the model is production-ready for replenishment decisions. Under 10% is excellent and probably means you have a stable B2B catalog.