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Web site usability is a quality attribute that assesses how easy user interfaces are to use. Also refers to methods for improving ease-of-use during design process.
Usability has five components:
Learnability - how easy it is for users to accomplish basic tasks.
Efficiency - once learners have performaed tasks.
Memorability - when users return after a period of time how easy it's to return.
Errors - how many errors do users make and how severs are those errors.
Satisfaction - how pleasant it is to use.
There are other important quality attributes but most important of other attributes is UTILITY.
How is usability identified?
Get any three to five users unless target audience is very distinctive.
Ask them to perform representative tasks.
Observe what the users do, they succeed and have difficulties. You must keep your mouth shut and let the user do the talking.
When doing a usability test, what do your record?
Any comments that the tester has.
How the user reacts and looks when trying to complete a task.
The key tasks are:
Give instruction on what user should be doing without being to pecific, depending on what you are testing or abserving.
What do you want to record?
What works well.
What doesn't work well.
Does site do what the user wants?
Do they get the point?
How do you record and quantify the results?
Measure time taken on any given task.
Note how many errors or wrong clicks.
You will need to measure user satisfaction on a non-bias way.
To see my reports on Ensure Site usability click here.
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