I couldn’t…

Did you hear this quote ( ^ ) from your client? Or as a client, did you say something like this? Then go read this article:

Collectively, the teams reported 340 usability problems. However, only nine of these problems were reported by more than half of the teams. And a total of 205 problems—60% of all the findings reported—were identified only once. Of the 340 usability problems identified, 61 problems were classifed as “serious” or “critical” problems.

The Myth of Usability Testing