This week's assignment, the final assignment for my interactive design class was about testing. This was very convenient because this week at work I also ran my first usability testing session for something other than an assignment, with people who weren't my family.
One thing I learned from doing that exercise, that I included in my test plan is the likelihood of finding flaws in the test plan while testing. In other words, as soon as you conduct your first study with your first participant, you might find things about the script you want to change, tasks you want to add, etc. For my test plan, I include two phases. The first is almost a trial to find the major flaws in the application and test scripts. The second is to send out the polished versions of each to a larger audience, with confidence that the test will run more smoothly and can be done remote or without a moderator.