From work experience, I have not encountered a product failure in the current company that I am apart of, but I have participated in a root cause analysis based on a problem identified from our engineering team, a problem which was identified to causing interference. Once the problem was identified and verified, the SOPs for this process was changed via a change order form and the beta testing units were then recalled in order to make the nessesary changes. We believe that having a controlled testing team is important in identifying such problems prior to it being released to the general public, which would help us save money and also the integrity of the company.