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ASSESSING THE QUALITY OF USABILITY
Equipping non design roles with the tools
designers use for testing quality of designs.
2
10 HEURISTICS OF USABILITY
Getting introduced to the basic principals of usability and there by making an
educated estimate of the designs usability.
WHAT IS HEURISTIC EVALUATION?
Heuristic evaluation involves having a small set of evaluators examine the
interface and judge its compliance with recognised usability principles. 

- Jacob Nielsen, 1994
3
WHAT ARE THE 10 HEURISTICS?
Visibility of system status
The system should always keep users informed about what is going on, through appropriate feedback within reasonable
time.
4
WHAT ARE THE 10 HEURISTICS?
Match between system and the real world
The system should speak the users' language, with words, phrases and concepts familiar to the user, rather than system-
oriented terms. Follow real-world conventions, making information appear in a natural and logical order.
5
WHAT ARE THE 10 HEURISTICS?
User control and freedom
Users often choose system functions by mistake and will need a clearly marked "emergency exit" to leave the unwanted
state without having to go through an extended dialogue. Support undo and redo.
6
WHAT ARE THE 10 HEURISTICS?
Consistency and standards
Users should not have to wonder whether different words, situations, or actions mean the same thing. Follow platform
conventions.
7
WHAT ARE THE 10 HEURISTICS?
Error prevention
Even better than good error messages is a careful design which prevents a problem from occurring in the first place.
Either eliminate error-prone conditions or check for them and present users with a confirmation option before they
commit to the action.
8
WHAT ARE THE 10 HEURISTICS?
Recognition rather than recall
Minimize the user's memory load by making objects, actions, and options visible. The user should not have to remember
information from one part of the dialogue to another. Instructions for use of the system should be visible or easily
retrievable whenever appropriate.
9
WHAT ARE THE 10 HEURISTICS?
Flexibility and efficiency of use
Accelerators -- unseen by the novice user -- may often speed up the interaction for the expert user such that the system
can cater to both inexperienced and experienced users. Allow users to tailor frequent actions.
10
WHAT ARE THE 10 HEURISTICS?
Aesthetic and minimalist design
Dialogues should not contain information which is irrelevant or rarely needed. Every extra unit of information in a
dialogue competes with the relevant units of information and diminishes their relative visibility.
11
WHAT ARE THE 10 HEURISTICS?
Help users recognize, diagnose, and recover from errors
Error messages should be expressed in plain language (no codes), precisely indicate the problem, and constructively
suggest a solution.
12
WHAT ARE THE 10 HEURISTICS?
Help and documentation
Even though it is better if the system can be used without documentation, it may be necessary to provide help and
documentation. Any such information should be easy to search, focused on the user's task, list concrete steps to be
carried out, and not be too large.
13
NOW TRY IT YOUR SELF!
Make My Trip
www.makemytrip.com
USABILITY TESTING
15
The ability to observe actual user behaviour while interacting with a system,
deriving a usability report based on actual facts unlike assumptions.
ENTREPRENEUR
USER
BAENTREPRENEUR
USER
BA DEVENTREPRENEUR
USER
BA DEVENTREPRENEUR
USER
ENTREPRENEUR BA UNSATISFIED USER
USER
DEV
Why would this happen ???
21
Nobody actually spoke to the users …
22
23
welcome to
USABILITY TESTING
101
WHAT IS USABILITY TESTING?
Usability testing is a technique used in user-centered interaction design to
evaluate a product by testing it on users. This can be seen as an
irreplaceable usability practice, since it gives direct input on how real users
use the system.
- Jacob Nielsen, 1994
24
SETTING UP AN ENVIRONMENT FOR USABILITY TESTING…
25
HEAT MAPS
26
EYE TRACKING / GLAZE PLOT
27
SETTING UP AN ENVIRONMENT FOR USABILITY TESTING…
28
CONDUCTING A USABILITY TEST
Knowing what to test and what to ask:
•Test key functions the product is offering.
•Rather than asking questions assign tasks in very simple and clear manner.
!
Selecting users for the test:
•A diverse sample of users is necessary.
•Sampling around 4 to 5 people is sufficient.
!
Actors in the test:
•A conductor who asks all the questions
•An observer who just makes observations and takes notes
29
BUILDING A TEST SCENARIO
!
Performance matrices
•Completion rates
•Time on task
•Errors
•Satisfactions
30
PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION
Portfolio What is this page about? Portfolio < 8 seconds
What does the graph indicate? Portfolio summary < 8 seconds
How would you see your
annual investment graph?
Click on ‘1y’ < 5 seconds
Where would you find your
mutual investments?
Click on 

‘Mutual Funds’
< 5 seconds
TEST ANALYSIS
31
TEST ANALYSIS REPORT
32
PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION
Portfolio What is this page about? Portfolio < 8 seconds 10 sec
What does the graph indicate? Portfolio summary < 8 seconds 6 sec
How would you see your
annual investment graph?
Click on ‘1y’ < 5 seconds 5 sec
Where would you find your
mutual investments?
Click on 

‘Mutual Funds’
< 5 seconds 3 sec
PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION
Portfolio What is this page about? Portfolio < 8 seconds 9 sec
What does the graph indicate? Portfolio summary < 8 seconds 7 sec
How would you see your
annual investment graph?
Click on ‘1y’ < 5 seconds 4 sec
Where would you find your
mutual investments?
Click on 

‘Mutual Funds’
< 5 seconds 4 sec
User 1
User …
TEST ANALYSIS REPORT
33
PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION
Portfolio What is this page about? Portfolio < 8 seconds 10 sec
What does the graph indicate? Portfolio summary < 8 seconds 6 sec
How would you see your annual investment
graph?
Click on ‘1y’ < 5 seconds 5 sec
Where would you find your mutual
investments?
Click on 

‘Mutual Funds’
< 5 seconds 3 sec
Average findings User 1 - User N
NOW TRY IT YOUR SELF!
IndiGo
http://book.goindigo.in
Questions?
THANK YOU

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ASSESSING THE QUALITY OF USABILTY

  • 1. v o d Q A ASSESSING THE QUALITY OF USABILITY Equipping non design roles with the tools designers use for testing quality of designs.
  • 2. 2 10 HEURISTICS OF USABILITY Getting introduced to the basic principals of usability and there by making an educated estimate of the designs usability.
  • 3. WHAT IS HEURISTIC EVALUATION? Heuristic evaluation involves having a small set of evaluators examine the interface and judge its compliance with recognised usability principles. 
 - Jacob Nielsen, 1994 3
  • 4. WHAT ARE THE 10 HEURISTICS? Visibility of system status The system should always keep users informed about what is going on, through appropriate feedback within reasonable time. 4
  • 5. WHAT ARE THE 10 HEURISTICS? Match between system and the real world The system should speak the users' language, with words, phrases and concepts familiar to the user, rather than system- oriented terms. Follow real-world conventions, making information appear in a natural and logical order. 5
  • 6. WHAT ARE THE 10 HEURISTICS? User control and freedom Users often choose system functions by mistake and will need a clearly marked "emergency exit" to leave the unwanted state without having to go through an extended dialogue. Support undo and redo. 6
  • 7. WHAT ARE THE 10 HEURISTICS? Consistency and standards Users should not have to wonder whether different words, situations, or actions mean the same thing. Follow platform conventions. 7
  • 8. WHAT ARE THE 10 HEURISTICS? Error prevention Even better than good error messages is a careful design which prevents a problem from occurring in the first place. Either eliminate error-prone conditions or check for them and present users with a confirmation option before they commit to the action. 8
  • 9. WHAT ARE THE 10 HEURISTICS? Recognition rather than recall Minimize the user's memory load by making objects, actions, and options visible. The user should not have to remember information from one part of the dialogue to another. Instructions for use of the system should be visible or easily retrievable whenever appropriate. 9
  • 10. WHAT ARE THE 10 HEURISTICS? Flexibility and efficiency of use Accelerators -- unseen by the novice user -- may often speed up the interaction for the expert user such that the system can cater to both inexperienced and experienced users. Allow users to tailor frequent actions. 10
  • 11. WHAT ARE THE 10 HEURISTICS? Aesthetic and minimalist design Dialogues should not contain information which is irrelevant or rarely needed. Every extra unit of information in a dialogue competes with the relevant units of information and diminishes their relative visibility. 11
  • 12. WHAT ARE THE 10 HEURISTICS? Help users recognize, diagnose, and recover from errors Error messages should be expressed in plain language (no codes), precisely indicate the problem, and constructively suggest a solution. 12
  • 13. WHAT ARE THE 10 HEURISTICS? Help and documentation Even though it is better if the system can be used without documentation, it may be necessary to provide help and documentation. Any such information should be easy to search, focused on the user's task, list concrete steps to be carried out, and not be too large. 13
  • 14. NOW TRY IT YOUR SELF! Make My Trip www.makemytrip.com
  • 15. USABILITY TESTING 15 The ability to observe actual user behaviour while interacting with a system, deriving a usability report based on actual facts unlike assumptions.
  • 21. Why would this happen ??? 21
  • 22. Nobody actually spoke to the users … 22
  • 24. WHAT IS USABILITY TESTING? Usability testing is a technique used in user-centered interaction design to evaluate a product by testing it on users. This can be seen as an irreplaceable usability practice, since it gives direct input on how real users use the system. - Jacob Nielsen, 1994 24
  • 25. SETTING UP AN ENVIRONMENT FOR USABILITY TESTING… 25
  • 27. EYE TRACKING / GLAZE PLOT 27
  • 28. SETTING UP AN ENVIRONMENT FOR USABILITY TESTING… 28
  • 29. CONDUCTING A USABILITY TEST Knowing what to test and what to ask: •Test key functions the product is offering. •Rather than asking questions assign tasks in very simple and clear manner. ! Selecting users for the test: •A diverse sample of users is necessary. •Sampling around 4 to 5 people is sufficient. ! Actors in the test: •A conductor who asks all the questions •An observer who just makes observations and takes notes 29
  • 30. BUILDING A TEST SCENARIO ! Performance matrices •Completion rates •Time on task •Errors •Satisfactions 30 PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION Portfolio What is this page about? Portfolio < 8 seconds What does the graph indicate? Portfolio summary < 8 seconds How would you see your annual investment graph? Click on ‘1y’ < 5 seconds Where would you find your mutual investments? Click on 
 ‘Mutual Funds’ < 5 seconds
  • 32. TEST ANALYSIS REPORT 32 PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION Portfolio What is this page about? Portfolio < 8 seconds 10 sec What does the graph indicate? Portfolio summary < 8 seconds 6 sec How would you see your annual investment graph? Click on ‘1y’ < 5 seconds 5 sec Where would you find your mutual investments? Click on 
 ‘Mutual Funds’ < 5 seconds 3 sec PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION Portfolio What is this page about? Portfolio < 8 seconds 9 sec What does the graph indicate? Portfolio summary < 8 seconds 7 sec How would you see your annual investment graph? Click on ‘1y’ < 5 seconds 4 sec Where would you find your mutual investments? Click on 
 ‘Mutual Funds’ < 5 seconds 4 sec User 1 User …
  • 33. TEST ANALYSIS REPORT 33 PAGE TASK EXPECTED ACTION EXPECTED TIME TIME TAKEN COMPLETION Portfolio What is this page about? Portfolio < 8 seconds 10 sec What does the graph indicate? Portfolio summary < 8 seconds 6 sec How would you see your annual investment graph? Click on ‘1y’ < 5 seconds 5 sec Where would you find your mutual investments? Click on 
 ‘Mutual Funds’ < 5 seconds 3 sec Average findings User 1 - User N
  • 34. NOW TRY IT YOUR SELF! IndiGo http://book.goindigo.in