So the alternatives are either:
Supplier places part in mounting/jig, robot drills holes according to Catia.
Or:
Supplier sends part to Boeing, Boeing puts part in mounting/jig, robot drills holds according to Catia.
I'm really not seeing how the supplier doing it gives greater accuracy than Boeing can manage for the same process. OTOH it does increase Boeing's Revenue Per Employee by shifting employee numbers over to the supply chain, and if your management bonus is dependent on improving RPE ....