The measure of usability is based on the quality of a user's experience when interacting with the website and the following factors are taken in to account.
- Ease of learning is the website navigation clear or does it require a learning process to access information?
- Efficiency of use when the user has become familiar with the interface, can they quickly access the information they require?
- Remembrance on return use, can the user retain the basic functions of the website or are they required to learn again?
- Error frequency does the user make errors in accessing the information they require?
- User Satisfaction is the user satisfied with the interface and do they enjoy using the website?