Usability Challenges for PhoneCom

Guanling Chen University of Massachusetts Lowell

http://www.cs.uml.edu/~glchen/

Mobile Usability Testing

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Android UI Framework

Dialog

Button Widget (View Class)

AdapterView (ViewGroup)

Menu

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Recorded Events

Recorded  Android  UI  Events  are  summarized  in  the  following  table,  classified  by  their  adhering  window  

Unhandled Area 10

State Machine Model

Expert  State  Machine:  

Expert  States  and  Transi3ons:  

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Traffic Flow Chart User  Traffic  Flow  Chart:  

Mistake  States  and  Transi3ons:  

Incoming  flow  

Outgoing  flow  

Flow  to  Mistake  States  

Backtracking  flow  

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Reported Metrics

Signs  for  poten3al  usability  problems:  

-­‐ Too  many  backtracking  

-­‐ Par0cipants  cannot  complete  one  step  

-­‐ Low  correct  flow  ra0o  13

Evaluation Usability  Problems  idenFfied  by  Event  Logging  Tool:  

*  Numbers  in  parenthesis  are  problems  idenFfied  by  Laboratory-­‐based  Usability  tesFng  method:  

-­‐  Good  at  iden3fying  cri3cal  (major  and  catastrophe)  usability  problems.  

-­‐  Not  good  at  iden3fying  cosme3c  usability  problems.  

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Challenges

•  More precise analysis model with semantics

•  Integration with context •  Inspection before deployment

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