You can track material usage using the invoicing process so that when you invoice your customer for an item, it is automatically removed from you material inventory.
The way to activate this feature is to make the rate code used to create the line-item match the code in the Material Master. They must match exactly.
With this done, when a line-item is added, the TAC system checks the Material Master to see if a code matches. If it finds a match, it will post a “USE” transaction code and reduce the on-hand inventory for that part.
When a line-item is deleted, a negative “USE” transaction code is issued and the amount returned to inventory.