Plan for 6 hours, however the interview process is very relaxed. It's not a stressful event. Yet, you will very much so want to be prepared. The interview process consist of fingerprinting, review of your logbook(s), and proper completion of your Pria forms. There's somewhat of a meet and greet followed by some alone time. After personal reflection, the panel interview. A little bit more of reflection time, then sim profile study that leads to the sim followed by a debriefing. I hope this helps. Good luck.