This is one to cut out and keep – two posters which are useful reminders of simple, but important, principles. Having recently seen some purported user needs which were anything but, a set of easily shared tests could be immensely valuable.
The second poster, on framing the problem, is also good though – reasonably enough for something produced for a service design conference – the framing suggested is very service focused. It’s a useful complement, though, to Lou Downe’s principles of good service design.