“(…) doing both ER followed by UT optimizes the return on the usability investment. ER identifies fundamental or generic challenges within the user experience. Usability Testing highlights contextually specific gaps between the user model and the site model. Executed together, UT builds on the ER, providing complimentary feedback supporting focused and actionable design recommendations. Thus, the power of combined usability review techniques is significantly enhances the power of the review.” (Kathleen Straub – The UPA Voice) – courtesy of step two design