Purpose describes why the tools
and techniques are being used and is described along four
dimensions: 1) for probing participants, 1) for priming
participants in order to immerse them in the domain of
interest, 3) to get a better understanding of their current
experience or, 4) the generation of ideas or design
concepts for the future, for instance by creating and
exploring future scenarios. It is possible to use each of the
forms with any of the purposes. Context describes where
and how the tools and techniques are used. Context is
described along these four dimensions: group size and
composition, face-to-face vs. on-line, venue, as well as
stakeholder relationships.