Gery's Law


"Designs fail when the effort required is greater than the time available at the moment of need or the perceived benefit." - Gery's Law, Gloria Gery

effort required > (time available + perceived benefit) = system failure

Since in most cases we cannot increase the time available (we only wish we could), we must either

1) reduce the effort required (make the system more intuitive, fewer steps, etc.)


2) increase the perceived benefit (communicating benefits, motivating the user)