I'll tell you the story how I've been changing the design of one single page for 3 years. I've added problems to the users, found out some interesting facts about the audience and managed to get a smart solution.
The case is about a mailings overview interface in Convead
marketing service – the project I'm working on.
Clients create different types of campaigns: automated, regular, scheduled. They launch, cancel, copy and organize them. The challenge was to make it easy, clear, minimize a number of errors and help desk calls.