This doesn&#x27;t happen much any more, but the case of the Vasa is a pretty good example of a bug in the measurement hardware. Different, incompatible rulers used during construction of opposite sides of the ship. Unfortunately that was during implementation phase and not the design phase. I would guess that there might be some errors in simulation routines that have cause structures to not have been designed with the tolerances they needed, however I don&#x27;t think that counts as CAD either.