This document provides information about a half-day post-conference workshop on June 5th, 2019 in San Diego, CA on identifying and addressing design flaws in medical devices before usability testing. The workshop will be led by Shannon Clark and will teach attendees principles of design, how to differentiate good and bad design through examples, and how to conduct expert reviews to uncover usability issues. Attendees will get hands-on experience reviewing prototypes and concepts to evaluate if they are optimized before testing. The workshop aims to help attendees learn how to identify design flaws early in the development process.