A difference in frequency of use can affect a dialog. A frequent user of a system, after becoming familiar with the system's operation, wants to complete each task with the minimum number of interactions possible. This results in fewer displays, more data presented in each display, and less help offered by the system.
The infrequent user needs a great deal more assistance from the system to complete the same work as the frequent user. As a result, the infrequent user will not object to a greater number of interactions.
The following illustration shows two separate sets of interactions that implement the same elementary process. Both sets of interaction implement Take Order. Each set uses a different dialog design and different procedures. One set accommodates frequent users, the other infrequent users.
The illustration uses screens as an example, but the same approach is true for windows.
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