Basics of Software Testing
tional profile can be estimated for a given class of users, then an accurate
estimate of the reliability can be found for this class of users. The sec-
ond definition is attractive in that one needs only a single number to
denote reliability of a software application that is applicable to all its
users. However, such estimates are difficult to arrive at.
1.3 REQUIREMENTS, BEHAVIOR, AND CORRECTNESS
Products, software in particular, are designed in response to require-
ments. Requirements specify the functions that a product is expected to
perform. Once the product is ready, it is the requirements that determine
the expected behavior. Of course, during the development of the product,
the requirements might have changed from wha ...