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Forecasting sales and reordering at the right time and quantity.

Getting started
  1. 1Create a free account and open Stock (it shares your shop with Commerce).
  2. 2Bring products and sales in from Commerce, import a CSV on Products, or load the sample.
  3. 3Enter each product's stock on hand, unit cost, lead time, minimum order and case pack.
  4. 4Set your service level and review period on Plan.
  5. 5Draft purchase orders from Order now, send them, and mark them received when they arrive.
How it works

How the forecast is chosen

Five methods each forecast the last 28 days from the days before them; the one that missed by the least is used, and its accuracy is shown. With less than 3 weeks of sales, Stock uses a simple average and says it hasn't been tested.

Safety stock and the reorder point

Safety stock = z × √(lead time × demand spread² + demand² × lead-time spread²). The reorder point is the forecast over the lead time plus safety stock. A higher service level means more safety stock.

On order

Purchase orders marked sent count as stock on its way, arriving on their wanted-by date. Mark them received to add the units to stock.

Troubleshooting

When something goes wrong.

Not listed here? Tell us what happened.

It sold almost nothing in the last 28 days. Check its sales came in (Bring in from Commerce, or a sales CSV with its SKU), or switch it off if it's discontinued.