There are those who will automatically reject the idea of autonomous site inspection on the assumption that it will be more expensive than the regular costs of operations because of the complex hardware and sophisticated software involved. While this may be true if one were to use a drone on a one-off or ad-hoc basis, overall the economic advantages to a fully autonomous system are very clear. The ROI can be massive when you consider not just how much employee time will be saved by not having to do manual inspections but how many hours of downtime will be prevented.