We have an aircraft component factory close to us (Ratier Aero part of the Collins group). On a recent open day we took in a tour of the workshops where the larger DNC machines collect their own swarf, extract the coolant from it, then wash and dry it. Swarf is then automatically collected and stored by material type for eventual sale. As you may guess, even the wash fluid is processed, cleaned and re-used!
At the assembly benches, all tools required for a specific job are drawn from stores as a kit, used and returned for inspection and re-use etc. No personal tools are allowed at the workbench.