Hello. Two months ago I had a small delay monthly, on...

[TATI]

Hello.
Two months ago I had a small delay monthly after which 2 3 days there was a botched work, and have then gone or send then usual monthly.
Next month all was normal, neither delays, nor botched work.
And this month - again. Again nearby 3 h days backlog from "schedule", then 3 days there was a botched work, and then again usual monthly.
Prompt, what's the matter?

[Malanova T.B.]

Make for 6 7 day of a cycle of US for definition of a situation.