How do you account for only a partial fraction of radiation being delivered due to machine malfunction?

For conventional fractionation, I have typically disregarded this partial dose and repeated that fraction at full dose unless it was >75%. For SBRT, in one case, half the dose was delivered in one arc. and the next day once the problem was fixed the patient received the second arc to complete that f...

Ignore it if conventional. Determine how much if SBRT.