Information Technology Reference
In-Depth Information
the site. The following sections present
some of these online services. This list is
not intended to be exhaustive, but it is at
least representative.
6.6.1 Website Analysis and
Measurement Inventory
The Website Analysis and Measurement
Inventory (WAMMI— www.wammi.
com ) is an online service that grew out of
an earlier tool called Software Usability
Measurement Inventory (SUMI), both
of which were developed in the Human
Factors Research Group of University
College Cork in Ireland. Although SUMI
is designed for evaluation of software
applications, WAMMI is designed for the
evaluation of websites.
As shown in Figure 6.14 , WAMMI is
composed of 20 statements with asso-
ciated five-point Likert scales of agree-
ment. Like SUS, some of the statements
are positive and some are negative.
WAMMI is available in most European
languages. The primary advantage that
a service like WAMMI has over creating
your own questionnaire and associated
rating scales is that WAMMI has already
been used in the evaluation of hun-
dreds of websites worldwide. When used
on your site, results are delivered in the
form of a comparison against their ref-
erence database built from tests of these
hundreds of sites.
Results from a WAMMI analysis, as
illustrated in Figure 6.15 , are divided into
five areas: Attractiveness, Controllability,
Efficiency, Helpfulness, and Learnability,
plus an overall usability score. Each of these scores is standardized (from com-
parison to their reference database), so a score of 50 is average and 100 is perfect.
Figure 6.14 The 20 rating scales used by the WAMMI online service.
6.6.2 American Customer Satisfaction Index
The American Customer Satisfaction Index (ACSI— www.TheACSI.org ) was
developed at the Stephen M. Ross Business School of the University of Michigan.
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