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Delta method is mainly focused on design and analysis phase rather than the implementation phase in the development process.
Input Activities Output
· Scenarios· Design Recommendations· User Profiling· Activity Graphs· System Vision· Guidelines · Develop test tasks· Set usability goals & requirements · Usability Specifications· Test Specification
The figure above shows the process of usability goals setting and requirement in Delta method, the Usability requirement setting.
Source: Adapted from http://www.deltamethod.net/7SettingUsabilityReq_index.htm
4.2 Setting Usability Goals
There are five main categories of usability goals, which are:-
· Learnability
· Efficiency
· Memorability
· Error
· Satisfaction
Learnability
Learnability is a way to measure learning aspects of usability, both initial learning and long-term learning and re-learning...
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