How many missed fractions will you allow for a definitive lung CRT before recommending treatment on the weekend?

The clinical scenario posted in this question is not rare, since patient compliance or machine issues could result in missing fractions (i.e. treatment break) as originally planned & scheduled in a conventionally fractionated radiotherapy course (including definitive lung CRT that typically aims to ...

Very complete answer by Dr. @Dr. First Last. There's an older paper from @Dr. First Last and the RTOG that looks at this: PMID 15927409. This would suggest there is some detriment to extending treatment time, though it wasn't a slam dunk here. I would say we also now need to be cognizant of our role...