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4.4. Discussion and Conclusion
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Wizard of Oz simulates a fixed idea of an envisioned system for testing the user
interaction with such a system. It also evaluates ‘magic’ concepts regardless of
the feasibility. X’treme Prototypes, however, inspire new, not fixed solutions
which only make sense if they can be implemented. Wizard of Oz may be
used for X’treme Prototyping for simplification reasons, but only if a potential
implementation is known.
With respect to the requirements stated in Section 2.1 the proposed X’treme Proto-
type approach was shaped with respect to most of them (for a detailed discussion see
Chapter 8). For example the users and various stakeholders are not only involved
and interviewed but could also contribute through their own ideas. We believe that
the X’treme Prototype is a highly valuable asset allowing to focus on a proposed con-
cept ideas and at the same time stimulate new ideas stakeholders can extrapolate
from.
The following Chapter 5 proposes two approaches that allow for faster development
cycles and useful abstractions from implementation details during the development
of an X’treme Prototype. After that, Chapter 6 and 7 show two cases where the
application of X’treme Prototyping results in concrete propositions and ideas on how
the respective technology may allow to depart radically from today’s work practices.
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