QOC ( Questions, Options, Criteria ) is used for design space analysis. It identifies the key design problems as questions and possible answers to questions as options.
QOC uses criteria to explicitly describe the methods to evaluate the options, such as the requirements to be satisfied or the properties desired. The options are linked with criteria positively or negatively and these links are defined as assessments.
1. How a user can navigate ?
O1: Touch screen
O2: Vocal navigation
C1: Accessibility
C2: Touch screen only interaction
2. How user can buy a movie ?
O1: Navigate through menu to movie store
O2: Search movie
C1: Accessibility
C2: Low user effort
3. How to display options and settings buttons ?
O1: Action bar
O2: Menu
O3: Dropdown list
C1: Accessibility
C2: Common pattern
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