Table 2 The usability attributes according to the ISO and Nielsen [12, 13]
Attribute | Definition |
|---|---|
Effectiveness | How well do the users reach the goals set with the usage of the system? |
Efficiency | How much of each resource (e.g., time and mental effort) is required so that the goals can be obtained by users? |
Satisfaction | How pleasant is the use of the system for users? |
Learnability | How easy is it for users to do basic tasks when using the system for the first time? |
Memorability | When the system has not been in use for a while, how easy can users remember how to use it? |
Errors | When using the system, how many errors are made, how severe are these errors and how easily can they be retrieved? |