Notes on multichannel stock control: sync, forecasting, reorder decisions and the day to day of selling on more than one channel.
Shopify grades your products on 28 days of its own revenue, before cost. Here is what that misses when you sell on more than one channel, and what buffer each grade actually earns.
One SKU selling on three channels has one true rate of sale. How to build the demand series, size safety stock across channels, and pick a model per SKU.
Pull sales history from every channel, build one demand series per SKU, measure lead time from your own purchase orders, and get a reorder point you can order against.
The six safety stock methods on every list are one formula with terms dropped. Which terms you may drop is a property of the SKU, not a preference.
Overselling is a race between a sale on one channel and the stock update on the others. How to size a buffer, and what each oversold order really costs.
An inventory app asks for write access to your live stock. How to test one without risk: let it run read-only and judge its log before anything changes.
Stocky closes on August 31, 2026. Historical purchase orders and stocktakes do not move to Shopify. Here is what to export, and what Stocky never gives back.
Shopify's built-in inventory now covers purchase orders, transfers, suppliers and counts. It does not forecast demand, and it does not see marketplaces like Amazon or eBay. The full map.
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