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How to perform a qoc analysis

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Presentation explaining the QOC method for selecting ideas

Presentation explaining the QOC method for selecting ideas

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  • 1. 1
    How to perform a QOC Analysis?
  • 2. It is a method for selecting design options
    QOC stands for
  • 5. Decompose your problem into important interaction problems.
    Reformulate each interaction problem so that it forms a question (How can … ?)
    Step 1: Questions
    for example:
    How can the interface of our online community allow users to gain status?
  • 6. Formulate the options that you found or create new options for the questions that you formulated.
    Step 2: Options
    for example:
    (question was: How can the interface of our online community allow users to gain status? )
    -Other users could vote for contributions
    -This will happen implicitly, we do not need to provide the option
    -One user will be put ‘in the spotlight’ on the front page
  • 7. Decide on criteria, on which you would like to judge the options.
    Designing Criteria Is difficult
    Objective (at least it should be possible to agree on the application of a criterion)
    Specific (makes scoring easier)
    Selective (if all options score the same the criterion is not so useful)
    Non-overlapping (if options score the same on multiple criteria you need less.
    Classic usability criteria are: learnability, efficiency, effectiveness, user satisfaction. Not all criteria need to be of the same weight, you can use weights in deciding for ideas.
    Classic sociability criteria are: Trust and Security, Governance, Accessibility, Effective Communication
    Step 3: Criteria
  • 8. See next slide: Each group member gives each option a score for each criterion.
    Scores can be: +1 (fits), 0 or -1 (doesn’t fit)
    Scores for all criteria are added.
    Criteria can be weighted if needed
    Step 4: Rating
  • 9. 7
    QOC Analysis - Score table
  • 10. If a criterion doesn’t differentiate, consider revising
    If scores are controversial (wide raging consider revising)
    Some ‘noise’ is expected on scores.
    If ‘winner’ has 45 and runner up 30 there is a true winner
    If ‘winner’ has 45 and runner up 41 the outcome is undecided (even replacing one group member would lead to a different score)
    Step 5: Interpretation
  • 11. There is a clear rationale for selecting the idea.
    You are more certain your included all information in your decision process
    Decision taking can be traced back later on in the process
    ‘Emotional’ arguments and ‘gut’ feeling are not well represented in QOC, but they are nevertheless important
    QOC Analysis Conclusions
  • 12. Questions, Options, and Criteria: Elementsof Design Space Analysis
    Allan MacLean, Richard M. Young, Victoria M., E. Bellotti, Thomas P. Moran
    HUMAN-COMPUTER INTERACTION, 1991, Volume 6, pp. 201-250. Copyright O 1991, Lawrence Erlbaum Associates, Inc.
    Online Version
    This presentation is (loosely) based on

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