Yes, there are many variables. Just for something to compare your project to, a producer friend just completed principal photography on a low budget Indi feature.
They are allowing 10 weeks for the off line edit, rough assembly, before the exec producer sees it and makes any changes. After that, any changes can be made. As the executive producer, if he doesn’t like what he sees, he can recut the film entirely or make any changes he wishes.
Note: This particular film was shot on 35mm with “down and dirty dailies” done to DV Cam for a low rez off line edit, so as to save money for the DI which is being done at Technicolor.
Whether or not you want to go to the expense of an on line finish (in a DaVinci suite, etc.)depends on your ultimate product release and budget. For a film-out theatrical release, you may want to up-rez for a 2K output and on-line finishing. Some festivals will accept digital cinema. Others require film.
Any way, when picture lock is achieved, the project goes into the DI suite for on-line color conforming and dropping any opticals into the project, as well as head and tail credits.
With a 2K color conformed file and a Digi-Beta copy, its time for the sound track. The music will be composed and recorded as well as ADR, Foly and SFX done and laid in. This process takes a few weeks more. Sound design is its own subject, as you probably know.
Next,its time for audience testing and any changes that need to be made so it plays as well as possible. Sometimes alternate endings are shown in order to see which one plays best. Those alternate endings are frequently included in the DVD.
When all this is done, its over to the distributors and to the executives do the festival thing. That’s a whole other game.
This is for a low budget indi feature, a comedy that is non-CG intensive. Yours may be different.
Hope that this gives you some idea of the process and what to expect for a simple off-line edit on a non-CG type of comedy. If you are only going out to DVD (not a theatrical release), you can probably complete the whole thing in your NLE. DVD authoring is another topic.
Best of luck,
PJ