I worked at Whidbeyhealth recently for a short time in the diagnostic imaging dept as a transporter/film room person. That was my job title and my job description. Being new and eager I asked to help other people within the dept when I wasn't busy. These tasks that I helped with would suddenly be my job. Then at my 3 month review I was given a negative one because I wasn't able to complete all the added on jobs in a timely manner. I was forced to have a "shadow", someone to watch how efficiently I worked and was eventually let go because "as the volume of work increased the more mistakes I made." The review was 100% positive regarding my job title and job description, but I was let go regardless. 
I really liked my job. I loved the people I worked with save the management and I loved helping people. I was good at my job. I feel I was let go unjustly and because of technicalities in verbiage and timelines, which DI mngmt took full advantage of, the union was unable to help me.