by Jeff Sauro | April 17, 2005 ::
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Measurement is at the heart of our scientific method. "Numerical Precision is the very soul of science" D'Arcy Wentworth Thompson, On Growth and Form (1917)
If you can't measure it, you cant manage it. (Old Management Saying)
>When you can measure what you are speaking about, and express it in numbers you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of and unsatisfactory kind: It may be the beginning of knowledge, but you have scarcely, in your thoughts, advanced to the stage of Science. Lord (William Thompson) Kelvin, pioneer in thermodynamics and electricity,1891.
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| September 3, 2009 | Mark Sheldon wrote: |
| If 100% of people can complete a task in 0 seconds it cannot be improved upon. How good usability is in reality is likely to be comparitive. A measure is useful as in peer group or competitive benchmarking you can identify best practice. You can also identify "verschlimbessurn" improvements that make things worse. A possible complexity may be if the task is for pleasure. |
| October 28, 2008 | Jeff Sauro wrote: |
| Interesting question. It depends on what you mean by user's experience. This measure, in its original 4 score form has a subjective component, task-level satisfaction. While these questions can vary, they usually ask the user how easy they thought the task was, how satisfied they were with the amount of time and ease in completing it. I believe that approaches what many consider the user's experience, perhaps not completely. Other ways to gauge user experience would be post-test questionnaires, such as the SUS, although we do not include that in the combined metric. |
| October 28, 2008 | Jerry wrote: |
| Could this measure be used to gauge the user's experience with a product or it is more a measure of how usable the product actually is? |
| June 5, 2008 | Joanne Locascion wrote: |
| I am trying to understand if there is a particular number by which something may be deemed or labeled as having "good" usability or "poor" usability. In other words, is a cut-off score. Trying to use this as part of a Master's project. Thanks |
| December 1, 2007 | anonomous wrote: |
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