Step 3: usability evaluation of CPOE technology
The researchers also evaluated the usability of the proposed
CPOE technology. Five independent HFE
experts evaluated the user interface of the software
application, using a set of HFE criteria.54 A total of
35 issues related to workload, compatibility, control,
homogeneity, guidance and error prevention were
identified and rated on a four-point scale for severity.
In a laboratory user testing, eight nurses used the
think-aloud method in a simulation of the preparation
of medication dispensers and the validation and documentation
of medication administration. The laboratory
test was designed to reproduce the nurses’ typical
work environment. Scenarios were created based on
the results of the initial work system analysis. Nurse
participants identified a total of 28 usability issues
during the test.