Stockout vs. Overstock: How to Calculate the True Cost of Getting Inventory Wrong in 2026

Inventory management in 2026 is a high-stakes game where “stockout vs. overstock” can determine your brand’s survival. This article explains why the safety stock formula is a key tool for calculating safer reorder points and protecting margin, while also breaking down the two critical types of replenishment time: Factory → 3PL and 3PL → FBA. We also show why FBA dripfeed through FBMFulfillment is so effective, how our exclusive FBA Replenishment Module automates replenishment, eliminates placement fees, reduces replenishment time, and why these 2 inventory flows require separate calculations because they are not the same math problem.