I should reword myself and say that it’s notifying maintenance at the hub to have them come out as opposed to just contacting MOC and getting guided through the process of deferring something. The reason being that a delay ensues when maintenance must come out... I don’t honestly know which would take more time- deferring yourself or having MX do it for you. Kind of like deciding whether to take the JITNEY or walking down terminal 4 at JFK.