[otrs] Ticket resolution time statistics

Hi all, I am evaluating the possibility to use OTRS in our company. One of our requirements is to be able to count how many tickets took longer than X time to be resolved. we also have two deparments, so, It would be even better if we can check for a certain department, which tickets took longer that a certain time. Is it possible with OTRS I have check in the web page but I didn't find an answer. Thanks in advance Alvaro Arenas