It's very easy. You put in what your preferences are and you NEVER get any of them. It's that easy. If, on the other hand, you were able to program in, or wrote a thesis on C++ you can get the most senior pilots' trips by simply programing the machine to do so. It's pathetic.
In all honesty it is getting better, but really, you may get some of the days off you specifically ask for, but I wouldn't recommend "Carmen" PBS to your worst enemy.(cause they probably can program C++)
Each month it seems to throw out "bazaar" results. That's the best way I can explain it. You get no advance warning, you can't trade since the company has "minimums reserves required" way above actual reserves. This basically locks your schedule on you.
The programming bit I referenced to above: E.G.
I was watching a "trainer" show someone how to ask for their exact type of flying they wanted.
He literally typed into the computer
Avoid "this certain type of trip"
Award"this certain type of trip"
And he got results out of that. He said "Yup, see what it's done?"
This should be taken off all servers at any company. You can't train people in that much detail. It's a wide awake nightmare.
And Finally to bring home what a mess the "Carmen" system is when crews meet at outstations for the night, if they sit down at restaurant or bar, PBS will come up rather quickly, AND WE TALK FOLKLORE AND MYTHS FOR AN HOUR MINIMUM. "I heard this one guy got great trips by putting in "Award work after each bid group". "Oh ya, I heard of this one guy that put "Avoid work" and put his type of requests for the computer to build in the Denial mode". It's all crap. It's such a mess, and the company is rolling with laughter, cause they're running us into the ground working. We've had 3 pilot heart attacks in the last 3 months in the air,(this isn't about that, stop it), it's about them running us into the ground and taking bonus' from the servant's work. This system took all vacation bidding out. You work up to the vacation date, and start work the day after. No month off. It's the week off ONLY.
I hate to sound so dim, but it's the truth. See if anyone else puts on "happy shoes" and taps around me. I bet not. But if they do ask them if they can program in C++ or something like that!