CAD can be a powerful tool when utilized to assess human size, strength, reach and visibility characteristics as they relate to the user population and system requirements.  

Virtual operator mannequins can be used to assess for fit, clearance, maximum strength & general workload.

Often existing system CAD geometry can be ported directly into the HF analysis for both operator size & working posture analysis, as well more general workload estimation & optimization processes.

Virtual environments can be used to assess sight-lines, and movement and team monitoring considerations.