http://www.flickr.com/photos/david_nicholai/987226801/




Usability testing
A brief introduction                 Philip M...
Outline
Outline

• What is usability?
Outline

• What is usability?
• Why is it important?
Outline

• What is usability?
• Why is it important?
• How can we find out how usable something is?
Outline

• What is usability?
• Why is it important?
• How can we find out how usable something is?
• What is usability tes...
Outline

• What is usability?
• Why is it important?
• How can we find out how usable something is?
• What is usability tes...
Outline

• What is usability?
• Why is it important?
• How can we find out how usable something is?
• What is usability tes...
What is usability?
What is usability?

Usability is essentially two things:
What is usability?

Usability is essentially two things:

• A measure of how easy something is to use.
What is usability?

Usability is essentially two things:

• A measure of how easy something is to use.
• Methods for impro...
What is usability?

Usability is essentially two things:

• A measure of how easy something is to use.
• Methods for impro...
Usability is all around us
Usability is all around us
Usability is all around us
Why is usability important?
Clumsy doors are annoying, but theyʼre not the end of
the world...
Life and death   http://www.flickr.com/photos/83823904@N00/64156219/
Life and death

Kegworth air disaster.




                         http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_S...
Life and death

Kegworth air disaster.

• East Midlands Airport, 1989.




                                 http://en.wiki...
Life and death

Kegworth air disaster.

• East Midlands Airport, 1989.
• One engine caught fire.




                      ...
Life and death

Kegworth air disaster.

• East Midlands Airport, 1989.
• One engine caught fire.
• Due to poor instruments,...
Life and death

Kegworth air disaster.

• East Midlands Airport, 1989.
• One engine caught fire.
• Due to poor instruments,...
Life and death

Kegworth air disaster.

• East Midlands Airport, 1989.
• One engine caught fire.
• Due to poor instruments,...
Money

Bad usability also costs money:
Money

Bad usability also costs money:

• People will go to great lengths to avoid using difficult
  systems.
Money

Bad usability also costs money:

• People will go to great lengths to avoid using difficult
  systems.

• If they ha...
Money

Bad usability also costs money:

• People will go to great lengths to avoid using difficult
  systems.

• If they ha...
Money

Bad usability also costs money:

• People will go to great lengths to avoid using difficult
  systems.

• If they ha...
Money

Bad usability also costs money:

• People will go to great lengths to avoid using difficult
  systems.

• If they ha...
Customer satisfaction and branding

But good usability can make you money:
Determining usability
How do we find out how usable something is?




                                 http://www.flickr.co...
Determining usability
How do we find out how usable something is?

• Expert review




                                 htt...
Determining usability
How do we find out how usable something is?

• Expert review
• Interviews and questionnaires




    ...
Determining usability
How do we find out how usable something is?

• Expert review
• Interviews and questionnaires
• Log fil...
Determining usability
How do we find out how usable something is?

• Expert review
• Interviews and questionnaires
• Log fil...
What is usability testing?
We get people to use something and watch them.
                                                ...
How many people?

You donʼt need an excessive number of participants.




                                               h...
How many people?

You donʼt need an excessive number of participants.




                                               h...
How many people?

You donʼt need an excessive number of participants.




Itʼs better to run more tests with fewer people....
Who should you test?

Almost anyone will do.
Who should you test?

Almost anyone will do.




   “The importance of recruiting representative users is overrated.

   ....
Who should you test?

Almost anyone will do.




   “The importance of recruiting representative users is overrated.

   ....
What equipment do you need?

If you want to record tests, as well as a computer, video
camera and microphone, you need som...
What equipment do you need?

If you want to record tests, as well as a computer, video
camera and microphone, you need som...
What equipment do you need?

If you want to record tests, as well as a computer, video
camera and microphone, you need som...
What equipment do you need?

However, you can do it on the cheap.

Silverback records the screen, iSight camera and mic. O...
Where does usability testing fit into QAT?
Throughout the design and development of the product.
                          ...
When should you test?

As often as your time and budget limits allow you.
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
When should you test?

As often as your time and budget limits allow you.

• Before you start, test the current system if ...
Summary
Summary

• Usability concerns every object and system.
Summary

• Usability concerns every object and system.
• Bad usability can be expensive and dangerous.
Summary

• Usability concerns every object and system.
• Bad usability can be expensive and dangerous.
• Good usability ca...
Summary

• Usability concerns every object and system.
• Bad usability can be expensive and dangerous.
• Good usability ca...
Summary

• Usability concerns every object and system.
• Bad usability can be expensive and dangerous.
• Good usability ca...
Summary

• Usability concerns every object and system.
• Bad usability can be expensive and dangerous.
• Good usability ca...
Questions?
             http://www.flickr.com/photos/david_nicholai/987226801/
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Usability Testing

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Usability Testing

  1. 1. http://www.flickr.com/photos/david_nicholai/987226801/ Usability testing A brief introduction Philip Morton
  2. 2. Outline
  3. 3. Outline • What is usability?
  4. 4. Outline • What is usability? • Why is it important?
  5. 5. Outline • What is usability? • Why is it important? • How can we find out how usable something is?
  6. 6. Outline • What is usability? • Why is it important? • How can we find out how usable something is? • What is usability testing?
  7. 7. Outline • What is usability? • Why is it important? • How can we find out how usable something is? • What is usability testing? • How does that fit into QAT?
  8. 8. Outline • What is usability? • Why is it important? • How can we find out how usable something is? • What is usability testing? • How does that fit into QAT? • Questions
  9. 9. What is usability?
  10. 10. What is usability? Usability is essentially two things:
  11. 11. What is usability? Usability is essentially two things: • A measure of how easy something is to use.
  12. 12. What is usability? Usability is essentially two things: • A measure of how easy something is to use. • Methods for improving easy-of-use during the design and development process.
  13. 13. What is usability? Usability is essentially two things: • A measure of how easy something is to use. • Methods for improving easy-of-use during the design and development process. In other words, itʼs how people interact with the systems and objects around them.
  14. 14. Usability is all around us
  15. 15. Usability is all around us
  16. 16. Usability is all around us
  17. 17. Why is usability important? Clumsy doors are annoying, but theyʼre not the end of the world...
  18. 18. Life and death http://www.flickr.com/photos/83823904@N00/64156219/
  19. 19. Life and death Kegworth air disaster. http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_Scene.jpg
  20. 20. Life and death Kegworth air disaster. • East Midlands Airport, 1989. http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_Scene.jpg
  21. 21. Life and death Kegworth air disaster. • East Midlands Airport, 1989. • One engine caught fire. http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_Scene.jpg
  22. 22. Life and death Kegworth air disaster. • East Midlands Airport, 1989. • One engine caught fire. • Due to poor instruments, communication and training, the pilots shut down the working engine. http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_Scene.jpg
  23. 23. Life and death Kegworth air disaster. • East Midlands Airport, 1989. • One engine caught fire. • Due to poor instruments, communication and training, the pilots shut down the working engine. • The plane hit the M1 motorway. http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_Scene.jpg
  24. 24. Life and death Kegworth air disaster. • East Midlands Airport, 1989. • One engine caught fire. • Due to poor instruments, communication and training, the pilots shut down the working engine. • The plane hit the M1 motorway. • 47 people died. http://en.wikipedia.org/wiki/File:Kegworth_Air_Crash_Scene.jpg
  25. 25. Money Bad usability also costs money:
  26. 26. Money Bad usability also costs money: • People will go to great lengths to avoid using difficult systems.
  27. 27. Money Bad usability also costs money: • People will go to great lengths to avoid using difficult systems. • If they have to use a difficult system, they will do so as little as possible.
  28. 28. Money Bad usability also costs money: • People will go to great lengths to avoid using difficult systems. • If they have to use a difficult system, they will do so as little as possible. • They will waste time.
  29. 29. Money Bad usability also costs money: • People will go to great lengths to avoid using difficult systems. • If they have to use a difficult system, they will do so as little as possible. • They will waste time. • More support will be necessary.
  30. 30. Money Bad usability also costs money: • People will go to great lengths to avoid using difficult systems. • If they have to use a difficult system, they will do so as little as possible. • They will waste time. • More support will be necessary. • More changes will be necessary.
  31. 31. Customer satisfaction and branding But good usability can make you money:
  32. 32. Determining usability How do we find out how usable something is? http://www.flickr.com/photos/forakerdesign/3658129812/
  33. 33. Determining usability How do we find out how usable something is? • Expert review http://www.flickr.com/photos/forakerdesign/3658129812/
  34. 34. Determining usability How do we find out how usable something is? • Expert review • Interviews and questionnaires http://www.flickr.com/photos/forakerdesign/3658129812/
  35. 35. Determining usability How do we find out how usable something is? • Expert review • Interviews and questionnaires • Log files and analytics http://www.flickr.com/photos/forakerdesign/3658129812/
  36. 36. Determining usability How do we find out how usable something is? • Expert review • Interviews and questionnaires • Log files and analytics • Usability testing http://www.flickr.com/photos/forakerdesign/3658129812/
  37. 37. What is usability testing? We get people to use something and watch them. Photo Courtesy of Foraker
  38. 38. How many people? You donʼt need an excessive number of participants. http://www.useit.com/alertbox/20000319.html
  39. 39. How many people? You donʼt need an excessive number of participants. http://www.useit.com/alertbox/20000319.html
  40. 40. How many people? You donʼt need an excessive number of participants. Itʼs better to run more tests with fewer people. http://www.useit.com/alertbox/20000319.html
  41. 41. Who should you test? Almost anyone will do.
  42. 42. Who should you test? Almost anyone will do. “The importance of recruiting representative users is overrated. ...itʼs much more important to test early and often.” — Steve Krug
  43. 43. Who should you test? Almost anyone will do. “The importance of recruiting representative users is overrated. ...itʼs much more important to test early and often.” — Steve Krug Friends, colleagues, housemates, random people in the street — theyʼre all likely to be suitable for most tests.
  44. 44. What equipment do you need? If you want to record tests, as well as a computer, video camera and microphone, you need some software.
  45. 45. What equipment do you need? If you want to record tests, as well as a computer, video camera and microphone, you need some software. Professionals use Morae, which is £120 - £900.
  46. 46. What equipment do you need? If you want to record tests, as well as a computer, video camera and microphone, you need some software. Professionals use Morae, which is £120 - £900. Most professionals also do eye tracking, which requires a special monitor and costs much more.
  47. 47. What equipment do you need? However, you can do it on the cheap. Silverback records the screen, iSight camera and mic. Only on Mac, but £30. + =
  48. 48. Where does usability testing fit into QAT? Throughout the design and development of the product. http://www.flickr.com/photos/nzdave/491410298/
  49. 49. When should you test? As often as your time and budget limits allow you.
  50. 50. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one.
  51. 51. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one. • Test the competition.
  52. 52. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one. • Test the competition. • Test design prototypes.
  53. 53. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one. • Test the competition. • Test design prototypes. • Test after any major milestones are completed.
  54. 54. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one. • Test the competition. • Test design prototypes. • Test after any major milestones are completed. • Test when youʼre doing beta testing.
  55. 55. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one. • Test the competition. • Test design prototypes. • Test after any major milestones are completed. • Test when youʼre doing beta testing. • Test after the product is shipped.
  56. 56. When should you test? As often as your time and budget limits allow you. • Before you start, test the current system if there is one. • Test the competition. • Test design prototypes. • Test after any major milestones are completed. • Test when youʼre doing beta testing. • Test after the product is shipped. Remember: changes are more expensive to fix the further into development you get.
  57. 57. Summary
  58. 58. Summary • Usability concerns every object and system.
  59. 59. Summary • Usability concerns every object and system. • Bad usability can be expensive and dangerous.
  60. 60. Summary • Usability concerns every object and system. • Bad usability can be expensive and dangerous. • Good usability can make you money.
  61. 61. Summary • Usability concerns every object and system. • Bad usability can be expensive and dangerous. • Good usability can make you money. • Watching people using your product is the best way to evaluate it.
  62. 62. Summary • Usability concerns every object and system. • Bad usability can be expensive and dangerous. • Good usability can make you money. • Watching people using your product is the best way to evaluate it. • You donʼt need a lot of money or people to do testing.
  63. 63. Summary • Usability concerns every object and system. • Bad usability can be expensive and dangerous. • Good usability can make you money. • Watching people using your product is the best way to evaluate it. • You donʼt need a lot of money or people to do testing. • Test early and often.
  64. 64. Questions? http://www.flickr.com/photos/david_nicholai/987226801/
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