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Certified Software Testing Professional Learning Resources Input combinations and preconditions

Learning Resources

Input combinations and preconditions

A fundamental problem with software testing is that testing under all combinations of inputs and preconditions (initial state) is not feasible, even with a simple product.

This means that the number of defects in a software product can be very large and defects that occur infrequently are difficult to find in testing. More significantly, non-functional dimensions of quality (how it is supposed to be versus what it is supposed to do) -- for example, usability, scalability, performance, compatibility, and reliability—can be highly subjective; something that constitutes sufficient value to one person may be intolerable to another.