Industrial engineers work on production processes. You can't make a bridge better without fully "grokking" the physics behind the original design. It isn't exactly amenable to incremental improvement.
https://www.youtube.com/watch?v=g8UePdbDmMw
This was one of the keynote speakers at the 2015 IISE National Convention. Nancy Currie was/is works for NASA and has education in Industrial Engineering. She worked extensively investigating the Columbia space shuttle incident. Her involvement shows how industrial engineers participated in making space flight safer / better. It's really not grokking the physics that can make things better. Excellent presentation.