3. Design tasks to answer questions
The best way to ensure clients get what they need is to create testing tasks that expose the qualities of the site they are interested in evaluating.
4. Get as many client observers as possible
Testing is always better when observed by as many stakeholders, creators, and controllers as possible.
5. Incorporate competitive offerings into the test plan
If possible, you want to include some tasks to be performed on competitive sites so there is context.