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The software engineering projects reveals that a large number of usability related change requests are made after its deployment. Fixing usability problems during the later stages of development often proves to be costly, since many of the necessary changes require changes to the system that cannot be easily accommodated by its software architectural design. This costs high for the practitioners and prevents the developers from finding all the usability requirements, resulting in systems with less than ideal usability. The successful development of a usable software system therefore must include creating a software architecture that supports the optimal level of usability. Unfortunately, no architectural design usability assessment techniques exist.
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