September 05, 2002
contingency design
Robust software design means designing for when things
go wrong. Testing and validating inputs, conditional
operations depending on how things got messed up all
make software more reliable and enjoyable.
In usability analysis and interaction design, contingency design
means planning for when the user could make a mistake:
catching the mistake, and providing contextual information
to avoid or repair the mistake.
37signals have a good exposition on contingency design.
For instance, isn't the second screen below better than the first:
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