Had a freelance job to convert hundreds of cad drawings to sub-d friendly polygons - OH WHAT FUN. Here are some conversion settings in maya that got me started.
Match render tessellation - Most basic - most renderers convert to triangles before rendering - so this just does that.
Here's some other dial and knob turning:
High count settings could be good for zbrush work.
Predictably this is the best to use for post cleanup with sub-d methods.
I've abbreviated and interpreted the settings.