Make a informed decision about CAM. It is the most important link in your CAD CAM system. A wrong CAM can shorten the life of your milling unit, shorten tool life, job rejections etc. As someone pointed out milling strategies/templates I don't think a lab is much informed about milling technology and hence won't be able to decide on the milling parameters like speeds and feeds, chip removal, cutter form and lengths etc.
It would be much important when you would like to upgrade your lab to do implant milling and metal.
Look into the history of Company developing the CAM.