Common Inventory Timing Mistakes Costing $1M+ Amazon and Shopify Brands More Than Ads

hey everyone 👋 something I keep seeing with brands past $1M on Amazon and Shopify. they're losing more money to inventory timing than to bad ads. buying too late, buying too much, or just going off gut feel. by the time the stockout or overstock hits, the damage is already done. fixing the demand plan before touching anything else usually moves the needle faster than any other lever. curious if anyone else has run into this. I run a supply chain firm called ProActiveChain.co so happy to share some quick tips if it's useful.