What Is Usability? Usability is a quality attribute that assesses how easy Web sites are to use....
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Transcript of What Is Usability? Usability is a quality attribute that assesses how easy Web sites are to use....
What Is Usability?
• Usability is a quality attribute that
assesses how easy Web sites are to use.
• “Usability" also refers to methods for
improving ease-of-use during the design
process.
What Is Usability?
• Learnability: How easy is it for users to
accomplish basic tasks the first time they
encounter the design?
• Efficiency: Once users have learned the design,
how quickly can they perform tasks?
• Memorability: When users return to the design
after a period of not using it, how easily can they
reestablish proficiency?
• Satisfaction: How pleasant is it to use the design?
User Experience
• Usability is a necessary condition for Web survival, people will leave if:– A Web site is difficult to use – The homepage fails to clearly state
what a company offers and what users can do on the site
– Users get lost– Information is hard to read or doesn't
answer users' key questions
User Experience
• A good user-experience should allow
users to find what they want quickly
and should help to eliminate
frustration in not being able to find
information
Usability Issues
• Functionality
– How easy is it for people to use the site?
• Design
– How well are the page elements
arranged?
– Is the site aesthetically pleasing?
Functionality
• It’s all about the Navigation
– Grouping Navigational Elements
GROUPED BY USER TYPE
GROUPED BY ACTIVITY
GROUPED BY ORDER OF EXPERIENCE
Functionality
• Grouping Navigational Elements
– Grouped by User Type, Activity, Order of
Experience, etc…
• Limit Number of User Groups (5-10)
– Too Few: Incomplete Appearance
– Too Many: Overwhelming to User
Functionality
• It’s all about the Navigation
– Grouping Navigational Elements
– Simple Naming Schemes
Functionality
• KSU Admissions Opportunities & Application Process
• Donations & Fundraising Drive / Donations of Clothes & Toys
• KSU UNICEF Chapter Fundraising Effort For Displaced Children
• Campus Employment Opportunities for Displaced Individuals
• English Language Support for Displaced Individuals
• Calendar of Campus Activities
• Admissions & Application
• Donations & Fundraising
• KSU UNICEF
• Campus Employment
• ESOL Support
• Campus Activities
Functionality
• Simple Naming Schemes
– Use Terms People Are Familiar With
(About Us, FAQ, Contact, etc…)
– Concepts Should Be Conveyed In Two
Words or Less
– Unconventional Naming Schemes = High
Probability In Confusing Your User
Functionality
• It’s all about the Navigation
– Grouping Navigational Elements
– Simple Naming Schemes
– Clear/Easy-to-Understand Labeling
Functionality
• Clear/Easy-to-Understand Labeling
– Navigation Options Should Be Easy to Find
and Readable
– Outside the Box for the Sake of Be Different
Can Seriously Negatively Impact a Site’s
Usability
– Just Because a Concept Makes Sense To You
Doesn’t Mean That Your Users Will “Get It”
Functionality
• It’s all about the Navigation
– Grouping Navigational Elements
– Simple Naming Schemes
– Clear/Easy-to-Understand Labeling
– Page-to-Page Consistency
Functionality
• Page-to-Page Consistency
– Navigation Areas/Regions Shouldn’t
Change Location Throughout the Site
– Main Navigation Options Should Remain
In the Same Order
– Navigation Look and Feel Should Remain
the Same Throughout the Site
Functionality
• It’s all about the Navigation
– Grouping Navigational Elements
– Simple Naming Schemes
– Clear/Easy-to-Understand Labeling
– Page-to-Page Consistency
Design
• Is the Site Aesthetically
Pleasing?
– A Well-Built Home Page
Design
• Effective Homepages Should Include:– Clear Logo/Titling in Header
– Most Important Navigational Element In Top Left-Hand Region
– Relevant Imagery
– Bottom Line: You should be able to look at the home page of any site and figure out what the site is about within four seconds. If you can't, your site has failed.
Design
• Is the Site Aesthetically
Pleasing?
– A Well-Built Home Page
– Too Much Material On One Page
Design
• Enhance Page Content by Providing
Clear Links, Headings, Short Phrases,
Short Paragraphs, and Bulleted Lists
• Users Tend to Scan, Stopping Only
When They Find Something
Interesting
Design
• Is the Site Aesthetically
Pleasing?
– A Well-Built Home Page
– Too Much Material On One Page
– Crazy Fonts
Design
• Use at Least a 10-point Font to Achieve
The Best Possible Reading Performance
• Fonts Smaller Than 10-Point Elicited
Slower Performance From Users
• The Older The Targeted Audience, The
Larger The Point Size (12-14 Point)
Design
• Use Fonts That:
• Fit the Character of Your Site,
• Are Easy to Read On a Computer Screen, and
• Are Widely Available
Design
• Is the Site Aesthetically
Pleasing?
– A Well-Built Home Page
– Too Much Material On One Page
– Crazy Fonts
