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Usability - PowerPoint PPT Presentation

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Usability. By: Sharett Wooten and Gwen Payne. What is Usability

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By: Sharett Wooten


Gwen Payne


  • 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 usability
    Why We Use and Need Usability

    • 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 in usability
    What Steps are Involved in Usability

    • Planning the Web-site

    • Collecting data from the user

    • Developing prototypes

    • Collecting, writing, or revising content

    • Conducting usability test

    What makes usability usable
    What makes Usability“Usable”

    • Ease of Learning

      How fast can a user who has never seen or used this interface before use it sufficiently.

      Efficiency of Use

      Once an experienced user has learned to use the system, how fast can he/she accomplish task

    What make usability usable continued
    What make Usability “Usable” Continued.

    • Memorability

      Can a user remember enough to use it effectively to the next time, or does he/she have to start over.

      Error Frequency and Severity

      How often do users make errors while using the system, how serious are the errors, and how do users recover from the errors.

      Subjective Satisfaction

      How much does the user like using the system.

    Usability testing
    Usability 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 continued
    Testing Continued

    • Goals of Usability Testing

    • Uncover any problems that users may encounter, so those problems can be fixed.

    What areas are usability products used in
    What Areas are UsabilityProducts used in

    • Web

    • Commerce

    • Industry

    • Home

    • Ergonomics

    Usability and the web
    Usability 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 continued
    Web 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 commerce
    Usability in Commerce

    • More business are using usability to improve productivity and customer satisfaction

    Commerce continued
    Commerce Continued

    • Business that employ Usability include:

    • Fast food restaurants

    • Gateway

    • Banks

    • Schools/Universities

    Usability and industry
    Usability and Industry

    • Industries use usability to increase the production speed of products

    Industries continued
    Industries Continued

    • Usability products include:

    • Assembly lines

    • Mechanical operators

    • Heavy equipment machinery

    Usability in the home
    Usability in the Home

    People use usability in the home to make everyday duties easier and more efficient.

    Home usability continued
    Home Usability Continued

    • Electrical appliances

    • Cleaning appliances

    • Cooking devices

    • Plumbing facilities

    Usability and ergonomics
    Usability 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 continued
    Ergonomics Continued

    • Researchers do this by studying human:

    • Capabilities

    • Limitations

    • Motivations

    • Desires

    Ergonomics continued1
    Ergonomics 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 usability
    How 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 continued
    Improving Usability Continued

    • Simple Search

      • Sites offer one input box and one button, linking to advanced search instead of featuring it.

        Check Out Forms and Registration

        Sites ask only for required data and explaining its uses, using clear labels and reasonable sizes.








    • Dr.Kardas’ website