You can use your stockrooms with the Replenish Stockroom Quantities automation policy. This policy automatically keeps track of the quantities of the consumable items in the stockroom, and performs a reorder if necessary.

For each consumable item that is listed under Stock Order Details of the stockroom, the task checks the quantity in a stockroom with the same Cost Center or Department. If it is less than the Order Level, the policy creates a purchase order with a quantity of Number To Order. The policy also sends an email notification to the stockroom manager to report that the purchase order is created.

See Creating a stockroom.

See About stockrooms.