Usability: deals with specific issues of human performance during computer interactions for specific tasks within a particular contest.
- refers to how well the information system product was designed for users to learn as well as to use.
- refers to how the system allows users to carry out their tasks safely, effectively, and pleasantly.
- is related to the human-centered design that is characterized by the active involvement of users and the clear understanding of user and task requirements
Usability testing: creating realistic clinical scenarios to which end users are asked to apply configured electronic tools, using the hardware that will be used in production.
The usability of a system can be measured by:
- Effectiveness (can users successfully achieve their objectives?)
- Efficiency (how much effort and resource are expended in achieving those objectives?)
- Satisfaction (was the experience considered satisfactory?)
The Five Goals of Usability:
- It is easy for users to accomplish basic tasks the first time they use the product.
- Once learned, the design permits users to quickly and easily perform the needed tasks.
- If it is not used for a period of time, it is easy to reestablish one’s proficiency in using the product.
- Users make very few errors, but any that they do make are easily remedied.
- The design is pleasant to use.
- Heuristic Evaluation or Heuristic Inspection Methods
- Simplified Usability test using Early Prototypes
- Cognitive Walkthrough
- User interview
- Critical incident analysis
- Satisfaction questionnaires
To be cont. … …