I can't help directly with your questions, but I would question the sanity of any company introducing Carmen. From my past experience of it, I have never seen a crew system which is so awful. You will have your time taken up with trying to work out why it has done something exceptionally odd, instead of whether it complies with the scheduling agreement.
It is a nightmare in BA and the sooner that WW wakes up and throws the system in the bin, the better. Much of the disruption which occurs following bad weather, industrial action, security strikes etc stems from Carmen's bonkers approach to rostering. Whilst the rest of us try to keep aircraft and crews together throughout their working day, it is not uncommon to find a flightcrew inbound from Lisbon, cabin crew inbound from Nice, aircraft inbound from Stockholm all trying to meet at Heathrow to operate an outward flight to Milan. If any one of those incoming flights suffers, the outbound Milan is stuffed. It holds together for the first couple of disrupted flights, as they have enough airport standbys etc to cover one or two problem areas, but as soon as the problems escalate to hit more than two or three flights, it's rather like a spinning top going out of balance. When it's spinning and balanced, it's great - but as soon as it goes off balance, it falls over pretty quickly.
Carmen also does numerous other exceptionally odd things. I seem to recall one Gatwick BA 737 crew plot which had crews nightstopping in Genoa even though we didn't have an aircraft nightstopping there; three crews per night overnighting in Barcelona for one nightstopping 737 (when two ought to be the absolute max if not one on a split duty), and all sorts of other really strange outputs. It drives ruthlessly towards maximising pilot utilisation and takes no account of other factors (operational integrity, allowance payments, quantities of hotac required and sheer common sense) which ought to be part of the crew planning process for any company.
God 'elp you, is all I can say.