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ReStream - Remmen - Video over IP - PowerPoint PPT Presentation


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ReStream - Remmen - Video over IP. Usability test results. Andreas Bergstrøm, Harald K. Jansson, Magnus Fredlund. Purpose. Why?. To test the general usability of the GUI To test for things not easily understood To look for errors To gain general feedback on the system. The prototype.

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restream remmen video over ip
ReStream -Remmen - Video over IP
  • Usability test results

Andreas Bergstrøm, Harald K. Jansson,

Magnus Fredlund

purpose
Purpose

Why?

  • To test the general usability of the GUI
  • To test for things not easily understood
  • To look for errors
  • To gain general feedback on the system
method
Method

How? - The tasks

  • Participants: Computer science personnel
  • Tasks:
    • The user described how he/she perceived the system
    • The user started a stream
    • The user stopped a stream
    • The user changed stream information
  • The user described his/her general opinion on the system, and what was good or bad
method1
Method

How? - The procedure

  • The user was given a brief introduction to the system
  • No training was given to the user
  • The tasks were performed
  • Data was collected by observing the user and noting problems which occured.
results
Results

What? - A general overview

  • General perception: All user perceived the correct usage of the system without training
  • Usage: 99 per cent of all tasks were performed quickly and correctly
  • The system at large would seem to be rather userfriendly
results1
Results

What? - The problems

  • The color-scheme was perceived by many of the users as ugly and unfitting
  • The lack of a back link from the options screen was extremely frustrating - not usable
  • The system was perceived to be very slow
  • The lack of green color to indicate stream process running was confusing to some users
  • The use of red color on the status indicator when then stream was off, indicated a critical error to many users.
slide9

Results

What? - The problems - part II

  • Options pane:
  • The phrasing “Toggle On/Off” was confusing to most users
  • The phrasing “Coverage-mode” was confusing to most users
  • The two system bugs caused some confusion
    • The system was unsure wheter a stream was on or off
    • Instead of Local, National and Global, and number was displayed.
discussion
Discussion

How to improve the system?

  • The color-scheme is clearly in need of redesign (Done)
  • The layout of the option page will need to be redesigned
    • Addition of back-link
    • Better placement on page
    • Better wording of some options
  • Placement of option page
    • Separate page - centered?
    • On main overview page instead of status information
slide12

Discussion

How to improve the system?

  • The usage of color to enhance usability of stream status information needs rethinking
    • Problem - streamer running does not mean AOK
  • The system now know whether a stream is on or off
  • The system needs to be speeded up or process indicator added
    • Fixed - Slow back-end replaced by fast back-end