insidemovies.ew.com:

Rand argues that if studios and visual effects companies were to do away with the fixed-bid business model and use a cost-plus model instead, directors would be more inclined to check in with VFX artists more frequently to prevent situations where “rebuilding that skyscraper” occurs. He hopes that directors can learn to look at an incomplete visual effects shot and provide feedback before the shot is done.

The imporatnt part is learn to look at incomplete shots. So much time is wasted by folks who can't see. This is a trait that makes a good artist. It should also apply to producers and directors as well. If you take a shot to final everytime you show it, you have just wasted a ton of time and more importantly money. Final is for the end when color and camera move have been locked down. Kinda like a locked cut.