
Test Adequacy Assessment
based exclusively on requirements can be enhanced. The more complex
the set of requirements, the more likely it is that a test set designed using
requirements is inadequate with respect to even the simplest of various
test adequacy criteria.
During the enhancement process, one develops a new test case and
executes the program against it. Assuming that this test case exercises the
program in a way it has not been exercised before, there is a chance that
an error present in the newly tested portion of the program is revealed. In
general, one cannot determine how probable or improbable it is to reveal
an error through test enhancement. ...