•What is Usability
Usability addresses the relationship between tools and their users. In order for a tool to be effective, it must allow intended to accomplish their tasks in the best way possible. The same principle applies to computers, websites, and other software. In order for these system to work, their users must be able to employ them effectively.
Why We Use and Need Why We Use and Need UsabilityUsability
Usability makes browsing web-sites easier and more enjoyable.
Usability makes the difference between performing a task accurately and completely or not, and enjoying the process or being frustrated.
Usability can make the difference between the success and failure of a system.
Software with poor usability can reduce the productivity of the workforce.
What Steps are Involved What Steps are Involved in Usabilityin Usability
Planning the Web-site Collecting data from
the user Developing prototypes Collecting, writing, or
revising content Conducting usability
test
What makes UsabilityWhat makes Usability “Usable”“Usable”
Ease of LearningHow fast can a user who has never
seen or used this interface before use it sufficiently.
Efficiency of UseOnce an experienced user has
learned to use the system, how fast can he/she accomplish task
What make Usability “Usable” What make Usability “Usable” Continued.Continued.
MemorabilityCan a user remember enough to use it
effectively to the next time, or does he/she have to start over.
Error Frequency and SeverityHow often do users make errors while
using the system, how serious are the errors, and how do users recover from the errors.
Subjective SatisfactionHow much does the user like using
the system.
Usability TestingUsability Testing
Testing includes:• One user at a time or two users working together.• Collecting data on the paths users take to do tasks • The errors they make• When and where they are confused or frustrated• Whether they succeed in doing tasks
• How satisfied they are with the experience
Testing ContinuedTesting Continued
Goals of Usability Testing•Uncover any problems that users may encounter, so those problems can be fixed.
What Areas are UsabilityWhat Areas are Usability Products used inProducts used in
Web Commerce Industry Home Ergonomics
Usability and the WebUsability and the Web
Usability is very influential on the web.
Remember to include the following when designing a web page:
The purpose is clear Users can find what they
need with ease Reveal site content
Web Usability ContinuedWeb Usability Continued
Enhance the page with visual design
Limit annoyances such as pop-ups
Make sure that all buttons, links, and directional applications are clear and concise.
Usability in CommerceUsability in Commerce
More business are using usability to improve productivity and customer satisfaction
Commerce ContinuedCommerce Continued Business that employ
Usability include: Fast food restaurants Gateway Banks Schools/Universities
Usability and IndustryUsability and Industry
Industries use usability to increase the production speed of products
Industries ContinuedIndustries Continued Usability products
include: Assembly lines Mechanical operators Heavy equipment
machinery
Usability in the HomeUsability in the Home
People use usability in the home to
make everyday
duties easier and more efficient.
Home Usability ContinuedHome Usability Continued Electrical appliances Cleaning appliances Cooking devices Plumbing facilities
Usability and ErgonomicsUsability and Ergonomics
What is ergonomics? Ergonomics is the study of
human characteristics for the appropriate design of the living and working environment.
The goal of ergonomics is to improve usability standards
Ergonomics ContinuedErgonomics Continued
Researchers do this by studying human:
Capabilities Limitations Motivations Desires
Ergonomics ContinuedErgonomics Continued
There are three levels at which ergonomic knowledge can be used:
Tolerable conditions do not pose known dangers to human life or health
Acceptable conditions are those upon which the people involved can voluntarily agree
Optimal conditions are so well adapted to human characteristics, capabilities, and desires that physical, mental, and social well-being is achieved
How to Improve UsabilityHow to Improve Usability
Present Product Options– This means putting all
options on one page,using plain color names, showing an image for each options in chart.
Improving Usability ContinuedImproving Usability Continued Simple Search
– Sites offer one input box and one button, linking to advanced search instead of featuring it.
Check Out Forms and RegistrationSites ask only for required data and explaining its uses, using clear labels and reasonable sizes.
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