Forgive me if this feature already exists (could someone point out where it is?).

 

We have a stock of toner for photocopiers, and it can be hard to keep track of how much toner is left so more can be ordered.

 

What I was thinking for this feature if (for example) toner was added as an item with a quantity, then when an incident is created, there would be a field for the item that is required for the incident (in my example it would be a toner cartridge). When the incident is resolved/closed, the item quantity would be deducted.

While I'm at it, it would be handy if there was a warning level, so when the stock gets below a user set amount, it could email a technician.