Days.

That's kind of what I was figuring.  So then, how does the system account for manufactured items and/or sub-assemblies that only take minutes to produce?  Assuming I can run a bunch of a particular part in one day, is the lead time assumed to be one day regardless of the amount of parts that can be run?
 
I know the routings has a field to enter actual runtimes, so I'm assuming that's where the specifics are entered.
 
Thanks again...