Introduction to Usability

  • 320 views
Uploaded on

A basis introduction to usability with examples & how to's. it helps to understand What is usability? How, when, and where can you improve it? Why should you care?

A basis introduction to usability with examples & how to's. it helps to understand What is usability? How, when, and where can you improve it? Why should you care?

More in: Design
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
No Downloads

Views

Total Views
320
On Slideshare
0
From Embeds
0
Number of Embeds
1

Actions

Shares
Downloads
4
Comments
0
Likes
1

Embeds 0

No embeds

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. An Introduction to Usability Maheswaran Ganesan User Experience Specialist http://www.maheshg.com 17th Nov 20111 www.maheshg.com
  • 2. Agenda  Why usability is so important?  What is Usability?  When to work on Usability?  How to evaluate its effectiveness?  Benefits of Usability  Writers contribution to Usability  Examples2 www.maheshg.com
  • 3. Why usability is important? Excellent usability in an application/product is essential for End-User Satisfaction. It is not an afterthought, nor an optional "nice to have", its a "must have"  Application/product/website state: If the interface is so unusable, then the user will not use it. They will not accept it  E-commerce state: If the customer cannot find the product, then the customer cannot buy the product.  Intranet: is a matter of employee productivity Usability helps companies understand their customers.3 www.maheshg.com
  • 4. What is usability? Usability is the measure of the quality of a users experience when interacting with a product or system - whether a web site, software application, mobile technology, or any user-operated device. "usability" also refers to methods for improving ease-of-use during the design process. -- useit.com Source: http://www.usability.gov/basics/index.html4 www.maheshg.com
  • 5. What Does Usability Measure?  Ease of learning – How easy is it for users to accomplish basic tasks the first time they encounter the design?5 www.maheshg.com
  • 6. What Does Usability Measure? Continued…  Ease of learning - How easy is it for users to accomplish basic tasks the first time they encounter the design?  Efficiency of use – Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?6 www.maheshg.com
  • 7. What Does Usability Measure? Continued…  Ease of learning - How easy is it for users to accomplish basic tasks the first time they encounter the design?  Efficiency of use - Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?  Memorability - When users return to the design after a period of not using it, how easily can they reestablish proficiency?7 www.maheshg.com
  • 8. What Does Usability Measure? Continued…  Ease of learning - How easy is it for users to accomplish basic tasks the first time they encounter the design?  Efficiency of use - Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?  Memorability - When users return to the design after a period of not using it, how easily can they reestablish proficiency?  Errors – How often do users make errors while using the system, how serious are these errors, and how do users recover from these errors?8 www.maheshg.com
  • 9. What Does Usability Measure?  Ease of learning - How easy is it for users to accomplish basic tasks the first time they encounter the design?  Efficiency of use - Once an experienced user has learned to use the system, how fast can he or she accomplish tasks?  Memorability - If a user has used the system before, can he or she remember enough to use it effectively the next time or does the user have to start over again learning everything?  Errors - How often do users make errors while using the system, how serious are these errors, and how do users recover from these errors?  Satisfaction - How pleasant is it to use the design?9 www.maheshg.com
  • 10. How to evaluate its effectiveness?10 www.maheshg.com
  • 11. Usability Testing… Definition Usability testing is a technique used to evaluate a product by testing it with representative users. Goal of the Usability Testing Is to identify any usability problems, collect quantitative data on participants performance (e.g., time on task, error rates), and determine participants satisfaction with the product.11 www.maheshg.com
  • 12. Usability Methods  Interviews/Observations  Focus groups  Group review or Walk-through  Heuristic review *  Walk-around review  Do-it-yourself walk-through  Paper prototype test  Formal Usability test  Controlled experiment  Questionnaires * Most popular of the usability inspection method12 www.maheshg.com
  • 13. When to Work on Usability?13 www.maheshg.com
  • 14. Usability in Software Design Usability plays a crucial role in a development process. Beginning with user research, through constant mapping of your requirements, up through usability testing, It is constantly striving for user satisfaction. Analysis Design Deploy  Ethnographic studies  Prototypes  Usability testing  Interviews  Card sorting  Heuristic evaluation  Surveys  Usability testing  Surveys  User scenarios  Participatory design  Workflow modeling  Focus groups14 www.maheshg.com
  • 15. Benefits of Usability…15 www.maheshg.com
  • 16. Benefits to the User…  Increased ease of use  Improved productivity (reduced time to complete a task and reduced errors)  Higher user satisfaction  Confidence and trust in a valuable resource If your users are satisfied, they will become loyal, and may even recommend your product or service to others.16 www.maheshg.com
  • 17. Benefits to the Company…  Reduced development time and costs  Reduced training & support costs  Reduced maintenance costs  Gain and retain happy loyal customers  Increased traffic, sales and revenues  Increased trust in the product and company A usable product is recognized, used, and recommended.17 www.maheshg.com
  • 18. Types of Usability Problems  Product doesn’t match job or task  Poor organization/layout  Unexpected occurrence of events  Product not self-evident  Requires recall rather than recognition  Inconsistent screens, messages, terminology  Design is inefficient  Cluttered or unattractive design  No feedback or poor feedback about status or errors  No exit or undo  Help or documentation is not helpful18 www.maheshg.com
  • 19. Good Usability…19 www.maheshg.com
  • 20. Example – Usable TASK: Find a company details by doing a basic search OK, this looks like main menu categories…20 www.maheshg.com
  • 21. Example – Usable TASK: Find a company details by doing a basic search OK, this looks like main menu categories… …and these are second level menu21 www.maheshg.com
  • 22. Example – Usable TASK: Find a company details by doing a basic search OK, this looks like main menu categories… …and these are second level menu Hmm, Im on search tab, and I can do basic search here22 www.maheshg.com
  • 23. If Usability Fails…23 www.maheshg.com
  • 24. Example – Not As Usable online car leasing portal Hmmm, where do I start? Too many text and graphics. its very hard to understand24 www.maheshg.com
  • 25. Example – Not As Usable electronic kit portal Hmmm, where do I start? Is this the latest product catalog? Are these products?25 www.maheshg.com
  • 26. Example – Not As Usable TASK: Find an electronic kit for a boy’s birthday Hmmm, where do I start? Is this the latest product catalog? Are these products? What’s this for? What’s this?26 www.maheshg.com
  • 27. Example – Not As Usable TASK: Find an electronic kit for a boy’s birthday Hmmm, where do I start?27 www.maheshg.com
  • 28. Example – Not As Usable TASK: Find an electronic kit for a boy’s birthday Hmmm, where do I start? Is this the latest product catalog? Are these products?28 www.maheshg.com
  • 29. Example – Not As Usable TASK: Find an electronic kit for a boy’s birthday Hmmm, where do I start? Is this the latest product catalog? Are these products? What’s this for? What’s this?29 www.maheshg.com
  • 30. Writers Contribution to Usability30 www.maheshg.com
  • 31. Being a writer, you can: In the Product Make sure  Headings and sub-headings are short, straightforward and descriptive.  The words, phrases and concepts used are familiar to the typical user.  UI string are written in the active voice. (but, Error messages in passive voice.)  Acronyms and abbreviations are defined when first used.  Button labels and link labels start with action words.  Error messages contain clear instructions on what to do next. (provide more detail about error messages if required.) for more info contact: Siddharth31 www.maheshg.com
  • 32. Being a writer, you can: In the Product Provide  Content for customized 404 Not Found‘ page  Info text to the user to warn about large, slow-loading pages (e.g. “Downloading…")  Tool tip message if required.32 www.maheshg.com
  • 33. Usability Sources  UPA— http://www.usabilityprofessionals.org/  Jakob Nielsen— http://www.useit.com/  Adaptive Path— http://www.adaptivepath.com/  Jared Spool— http://www.uie.com/  Human Factors, Inc.— http://humanfactors.com/home/usability.asp33 www.maheshg.com
  • 34. ? Questions?34 www.maheshg.com
  • 35. Thank you! 35 www.maheshg.com