“cause and effect” write up

I need help writing a sophisticated evaluation about myself in my job. My evaluation must have a good “cause and effect” write up. I work in the Navy, and I’m a personal specialist (Google can give you a good description of it). I have been a supervisor in the Receipts department for more than a year, I have 2 subordinates under me. I audit travel claims and process new checked in sailors. I have done such a better job than the previous supervisor in my department. Customer feedback on my work: “received my travel claim within 30days”….’The rating of my department never was above the percentile due to timeliness’…..