March 2000
Intermediate to advanced
256 pages
6h 43m
English
Content preview from Humane Interface, The: New Directions for Designing Interactive SystemsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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4-3. Measurement of Interface Efficiency
Every tool carries with it the spirit by which it has been created.
—Werner Karl Heisenberg
We have looked at two interfaces, one of which will take about 5 seconds to operate and the other of which will take more than 15 seconds to operate. It is clear which of the two better satisfies the requirement. The next question that we ask is how fast an interface that satisfies the requirement can be.
Given a design for an interface, you can use GOMS and its extensions to calculate how long a user will take to accomplish any well-defined task with that interface. But analysis models do not answer the question of just how fast you should expect an interface to be. To answer this question, we can use a measure ...
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