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the many faces of


consistency
Why Consistency is Not Everything,
and Seamless Task Migration is Key

   • Manas Tungare
   • Pardha S. Pyla
   • Manuel ...
Consistency

• Data
• Functionality
• Interaction     ● also,

• Behavioral      ● Task Disconnects

• Context         ● S...
Examples
• Features, not products    Consistency
• Certain forms of         ? Data
  consistency present      ? Functional...
iTunes + iPod
          •   iPod Shuffle

          •   Podcasts


              Consistency
          ✔ Data
             ...
Address book
        •   Search / browse

        •   Large type vs. ‘Call’

              Consistency
            ✔ Data
...
Calendar
       •    Cellphone UI

       •    Voice access


            Consistency
           ✘ Data
           ✔ Funct...
Alarms
                   •   Chaos
Rrrrrrrrrring!!!
                   •   Support for Task
                       Migrat...
Maintaining context
            •   Resume playback

            •   Resume editing
                (e.g. vi)

           ...
Task Disconnects

• The break in continuity that occurs due to
  the extra actions outside the task at hand
  that are nec...
Design Issues

• Holistic Interaction Design
 • ... for an ecosystem of devices
• Task & data partitioning
• Minimize plan...
Conclusion
    Seamless Task Migration
as a higher goal than consistency
          for successful
    Multiple User Interf...
Questions & Discussion

                 ?
     ?
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Why Consistency is Not Everything, and Seamless Task Migration is Key

Manas Tungare, Pardha S. Pyla, Manuel Pérez-Quiñones; Multiple User Interfaces: Why Consistency is Not Everything, and Seamless Task Migration is Key.; Proceedings of the CHI 2006 Workshop on The Many Faces of Consistency in Cross-Platform Design..

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Why Consistency is Not Everything, and Seamless Task Migration is Key

  1. 1. the many faces of consistency
  2. 2. Why Consistency is Not Everything, and Seamless Task Migration is Key • Manas Tungare • Pardha S. Pyla • Manuel Pérez-Quiñones
  3. 3. Consistency • Data • Functionality • Interaction ● also, • Behavioral ● Task Disconnects • Context ● Seamless Task Migration • Definitions? ● A brief introduction
  4. 4. Examples • Features, not products Consistency • Certain forms of ? Data consistency present ? Functionality • Others, absent ? Interaction • What makes it good? ? Behavioral ? Context • ... Or bad?
  5. 5. iTunes + iPod • iPod Shuffle • Podcasts Consistency ✔ Data Functionality ✘ Interaction Behavioral Context
  6. 6. Address book • Search / browse • Large type vs. ‘Call’ Consistency ✔ Data Functionality ✘ Interaction Behavioral Context
  7. 7. Calendar • Cellphone UI • Voice access Consistency ✘ Data ✔ Functionality ✘ Interaction Behavioral Context
  8. 8. Alarms • Chaos Rrrrrrrrrring!!! • Support for Task Migration? Consistency * Data Functionality ✘ Interaction ✔ Behavioral Context
  9. 9. Maintaining context • Resume playback • Resume editing (e.g. vi) Consistency ✔ Data ✘ Functionality ✘ Interaction Behavioral ✔ Context
  10. 10. Task Disconnects • The break in continuity that occurs due to the extra actions outside the task at hand that are necessary when a user attempts to accomplish a task using more than one device.
  11. 11. Design Issues • Holistic Interaction Design • ... for an ecosystem of devices • Task & data partitioning • Minimize planning activity & cognitive effort
  12. 12. Conclusion Seamless Task Migration as a higher goal than consistency for successful Multiple User Interfaces
  13. 13. Questions & Discussion ? ?

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