↪ Replying to @mikeosswald
@mikeosswald Important to define what a usability test is, e.g. how users are relevant, how long it runs and how many features are included.
@mikeosswald As I see it, we shouldn't be counting usability issues, we should be always searching critical obstacles to goal fulfillment.
@mikeosswald Also, the rule gives no clues on how fast issues should be fixed and how soon the next study should run...