usability intro 419
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Usability
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Usability (n): The effectiveness, efficiency, and satisfaction with which users can achieve tasks in a particular environment of a product.
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High usability means a system is:
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easy to learn and remember
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efficient, visually pleasing,and fun to use
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quick to recover from errors
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If your audience finds your document difficult to use, it
doesn’t mean that they’ve failed.
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It means that you failed them.
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Things should be obvious.
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• Where to click
• How to search
• How to navigate individual pages
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Bad design is one thing, but ...
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context is another part of the problem.
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We’d like to think of our readers as...
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This almost never happens.
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Users look feverishly foranything that is:
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interesting
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vaguely resembles what they’re looking for
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is clickable.
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Usability is mostly common sense.
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We don’t read screens.
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We don’t read screens.We scan screens.
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We don’t makeoptimal choices.
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We satisfice.
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satisfying + sufficing = satisfice
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Why not look for the best choice?
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4
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1. We’re usually in a hurry.
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2. There’s not much of a penalty for guessing wrong.
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3. Weighing options may not improve our chances.
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4. Guessing is more fun.
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Your job is to take all this into account.
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Designing and writingwith end-users in mind
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Designing and writingwith end-users in mind
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Revisingwith end-users in mind
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Revision
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We’re not fixing websites in this class.
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We’re making recommendations
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about effective revision.
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but in the process,
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you’ll write.a lot.
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Professional Writing
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Status ReportsHeuristic Evals
Testing MaterialsExecutive Summaries
Testing ReportsPerformance Evals
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This is also a class about
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work.
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Working ...professionally.
in distributed environments.
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