I'm sure there is on paper but with productions in real life its so incredibly difficult to account for delays so practically probably not. i mean just look at this last week or so with all the tech pauses we've had not to mention even a series going long due to a couple overtimes or one really long one. This stuff isn't unheard of and is common enough to be a pretty big factor. You need redundancy built into schedules like this and a 4 day schedule would destroy that.
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