Some companies fill this role with a
graphic designer, the product manager, or a programmer.
Interaction designers divide their time between working with the team and working with users. They
contribute to release planning by advising the team on user needs and priorities. During each iteration,
they help the team create mock-ups of UI elements for that iteration??™s stories. As each story approaches
completion, they review the look and feel of the UI and confirm that it works as expected.
The fast, iterative, feedback-oriented nature of XP development leads to a different environment than
interaction designers may be used to. Rather than spending time researching users and defining
behaviors before development begins, interaction designers must iteratively refine their models
concurrently with iterative refinement of the program itself.
Although interaction design is different in XP than in other methods, it is not necessarily diminished.
XP produces working software every week, which provides a rich grist for the interaction designer??™s
mill. Designers have the opportunity to take real software to users, observe their usage patterns, and
use that feedback to effect changes as soon as one week later.
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