Lrt System
USABILITY GOALS AND COMPETITIVE ANALYSIS
4.1 Objectives
Usability goal is an objective to measure the usability of the system. Usability goals are to help in delivering a usable system to its users.
There are various usability goals that can be developed for every system, where some of these usability goals can be detected before the proposed system is being developed.
Using the Delta method in the design and analysis phase during development, it will be able to confirm that the system is developed with high usability. 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. A system which is easy to use/learn will be considered as a good system, and an easy to use/learn system is a system with an interface which is easy to learn allows users to build on their knowledge without deliberate effort.
Efficiency
Efficiency is a way to measure aspects of usability in terms of how fast and easily the tasks can be performed on the system, and information can be found and used from user documentation. When the user is...
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