If you are using the Inventory Management feature on Cloud, you will have the option to reserve products that have been marked as “Inventory-Tracked Items” for your projects.
Reserving inventory-tracked items automatically decrements their available quantity and helps you create purchase orders (POs) and procure the necessary quantity to maintain sufficient inventory.
If you want to start using the Inventory Management feature, check out the QuickStart and FAQ articles.
If you want to reserve inventory-tracked items for projects, check out this article.
Once reserved, you can unreserve items from a project and reserve them for another project.
Check out this article for more details.