I am on a project where the remaining logic has the project 20 days behind, but 24 days behind the dates for the same item from the Approved baseline from 8 months prior. Is the project 20 or 24 days behind? I would say 20, others say 24. 24 would be more correct for a claim situation, but how often do these really end up in court or arbitration - the 20 is more practical. In this case its not a big difference - but it can be. In this case I am guessing calendar complications, but it can be caused by many things.