tic methodological issues. Thus, each of the three components will be reviewed
in turn, trying to bring out the essential character of the problem with each.
18.3.1 Effectiveness, Dimensionless, and Embodied Metrics
Effectiveness is best measured in terms of how closely a user achieves results that
conform to what is required of the software system. Very often, in testing, the
intended results are specified in behavioral terms, assuming a known universe.
For instance, in evaluating a Web site for booking flights, if the user is instructed
to “find the cheapest airfare for a flight from Cork to Boston in the week of the
...,” the true result is known and ...