How long will it take for shows to get up and running?

So this is like the 12th thread with this exact topic asked? WTF?!

As with everything else, it depends. If a show stays largely intact, I would think the new folks would rehearse as they routinely do before being put in, and then the cast would come in for an extended period  (like 2 weeks) as Jordan is suggesting. To me that is 6 weeks or thereabouts. During the early weeks, crew will get up to speed and every element will be checked and rechecked. Things have a way of breaking when they are not used, and not everything can be reproduced on a dime. 

For a new show (and I think that's what CM is talking about but I have not read whatever he said) I think 4-5 months is the right number. And again, remember that a lot of shows are fed to Broadway via out of town or off-B, so a lot of these shows are not coming in as quickly as that. Expect it to take a year or more from the first shows for there to be a significant number of shows on the main stem.

And yes there will be many many variations on this theme.