Project Material Tracking without utilizing item numbers

I have few questions regarding Projects Material tracking. We are not using item numbers for materials ordered for Projects. As these material/inventory do not go through Inventory module, we cannot keep track of what went to a project, how much is consumed and what is the surplus. Business do not want to use item numbers for thousands of items needed for a project. Inventory team and Requisition team do not need to create an item number in the system, as it will make the process tedious and slow down the requisition process. Everything is driving through item description at this