If you leave layout checking until too late, you can expect to spend a lot of time iterating with the engineer, manufacturing, and, even worse, yourself! With the number & complexity of electrical and manufacturing constraints exploding, time spent loading constraints upfront will eliminate iterations.
Best case, constraints should be followed in real-time so that they are never violated. At the very least, any layout tool worth its salt should allow you to verify constraints at any instant in the design cycle. Guess what? Many layout tools lack salt!
This session will cover the best-in-class, constraint-driven methodology illustrated by the capabilities of Expedition Enterprise.