After the end of the design phase, the PDA is tested by both in-house testers as well as pilot
customers. In the inhouse-testing process mostly VR techniques are used to get feed-back as fast
as possible. By handling a virtual model of the digial mockup, Mrs Green decides that a much
bigger display is needed. After incorporating this and other changes in the digital mockup, RPtechniques
are used to produce a prototype to make pilot customers experience the handling of
the new version. Mr White, one of the pilot user, finds the new version very satisfying, however
his experiences from everyday handling suggest that different proportions of the PDA are needed.
For this reason, a second design cycle is initiated. Still using the digital mockup, components
are rearranged and the PDA is tested virtually and physically again to see if it now meets the
costumers demands. During the pilot phase, Mitech becomes aware of the availability of this
new PDA with flexible display and shows interest in a specialized version for the realization of
Sheila. Using a oversized display, improved storage capacities, and a faster processor, this version
has the necessary hardware requirements for the realization of Sheila, including the processor
performance for the improved speech recognition software to be supplied by Phosys