Products under warranty are tracked by Manufacture, Product and Serial Number.
They are indexed against Customer Purchase Orders and against Invoiced Products Shipped to the Customer.
It becomes important learning how the product is being used, Was the product right for the application or should another have been recommended. Returns are part of business especially as the business considers its brand in solving its customers problems
Products are part of Assets

The customers wants a product to work for the intended use case. When the product doesn’t work, they want a path to return Material and get replacement for their needs.
Return Material Authorizations require
a champion to serve the customer

Serial Numbers are Unique when they Include:
Manufacture and Product Id
