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Usability testing

Prepared by Masoud Biglari


To be usable, a product or service should be useful, efficient, effective, satisfying, learnable and accessible.

Usability | Draft | Agust 2016


Accessibility

Learnability

Usefulness

Usability Satisfaction

Efficiency

Effectiveness

Usability is the cornerstone of user experience. If a product isn’t usable, the experience of using it can never be good.

Usability | Draft | Agust 2016


Great user experiences are powered by customer and user-centric thinking in all aspect of design and development.

Usability | Draft | Agust 2016


Usefulness If a system is easy to use, easy to learn, and even satisfying to use, but does not achieve the specific goals of a specific user, it will not be used even if it is given away for free.

Usability | Draft | Agust 2016


Efficiency is the quickness with which the user’s goal can be accomplished accurately and completely and is usually a measure of time.

Usability | Draft | Agust 2016


Effectivness refers to “accuracy and completeness.� Error-free completion of tasks is important in both business and consumer applications.

Usability | Draft | Agust 2016


Learnability is a part of effectiveness and has to do with the user’s ability to operate the system to some defined level of competence after some predetermined amount and period of training.

Usability | Draft | Agust 2016


Satisfaction refers to the user’s perceptions, feelings, and opinions of the product, usually captured through both written and oral questioning. Users are more likely to perform well on a product that meets their needs and provides satisfaction than one that does not.

Usability | Draft | Agust 2016


Accessibility ISO 9241-171 (2008) defines accessibility as usability of a product, service, environment or facility by people with the widest range of capabilities. However, making a product usable for people with disabilities- or who are in special contexts, or both- almost always benefits people who do not have disabilities.

Usability | Draft | Agust 2016


“Usability testing refers to a process that employs people as testing participants who are representative of the target audience to evaluate the degree to which a product meets specific usability criteria.� (Rubin, Chisnell 2008). During the test, participants will try to complete particular tasks while observers watch, listen and takes notes.

Usability | Draft | Agust 2016

Usability testing  
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