Extra inventory kept on hand to protect against demand variability, supply delays, and unexpected stockouts.
TL;DR Buffer inventory is the extra stock you hold to keep selling when a supplier ships late. For most Amazon FBA sellers, sizing it to your lead time variability, then splitting it between FBA and a 3PL or AWD, protects your Buy Box and IPI without drowning your cash in units you cannot sell fast […]
TL;DR Lead time variability is the swing in how long your supplier actually takes to deliver, not the average. It matters more than the average because your safety stock scales directly with that swing. For most Amazon FBA sellers, taming lead time variability protects service levels better than shaving a few days off the average. […]
TL;DR The reorder point formula tells you exactly when to place your next purchase order so inventory arrives before you stock out. The formula: (Average Daily Sales × Lead Time in Days) + Safety Stock. For most Amazon FBA sellers, the tricky part is getting accurate inputs, especially lead time, which needs to include FBA […]
You’ve done everything right. Your supplier shipped on time, your freight forwarder hit the delivery window, and Amazon checked in your inventory without delays. Then out of nowhere, demand on your best-selling ASIN doubles for two weeks. Maybe a competitor went out of stock. Maybe an influencer mentioned your product. Doesn’t matter. You’re out of […]
Nine plain-English calculators built for Amazon FBA — safety stock, reorder points, stockout cost, FBA fees. Runs in your browser. Your numbers never leave the page.