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.