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Outline

1	Usability Factors: A CPOE Example Tom Wessel, MD Medical Information Officer Spartanburg Regional Healthcare System
2	Usability Evaluation Objectives Improve user training/education Provide specific feedback to vendor Identify software/hardware changes to be made by hospital information services
3	Attributes of System Usability Learnability Efficiency Memorability Errors Satisfaction Nielsen, Jakob. Usability Engineering, AP Professional (1993)
4	Attributes of System Usability Learnability: the novices' ability to reach a reasonable level of performance rapidly Efficiency Memorability Errors Satisfaction
5	Learnability +
6	Learnability -
7	Attributes of System Usability Learnability Efficiency: the expert user's level of performance, which is typically measured by the speed of performance Memorability Errors Satisfaction
8	Efficiency +
9	Efficiency +
10	Efficiency +
11	Efficiency -
12	Attributes of System Usability Learnability Efficiency Memorability: the casual user's ability to remember how to use a system after a period of time Errors Satisfaction
13	Memorability +
14	Memorability -
15	Attributes of System Usability Learnability Efficiency Memorability Errors: the number of errors users make, the ability to recover from errors, and the existence of catastrophic errors, which destroy the user's work Satisfaction
16	Error Handling +
17	Error Handling -
18	Attributes of System Usability Learnability Efficiency Memorability Errors Satisfaction: a subjective assessment of the system concerning how pleasant it is to use
19	Satisfaction +
20	Satisfaction +
21	Satisfaction +
22	Satisfaction -