Check out this tutorial I posted recently about my methods for logging interviews. It might be of some help.
I don't mention this in the video, but some people prefer to log interview clips in the timeline with markers for detailed transcriptions or notes. For what I've been doing, I prefer my system of using answer keywords + notes.
Michael Garber
5th Wall - a post production company
Blog:
GARBERSHOP
My Moviola Webinar on Color Correcting in FCP X
My Moviola Webinar on Cutting News in FCP X