In a software development project, errors can be injected at any stage during the development. For each phase we have discussed different techniques for detecting and eliminating errors that originate in that phase. However, some requirements errors and design errors are likely to remain undetected. Ultimately, these errors will be reflected in the code. Since code is frequently the only product that can be executed and whose actual behavior can be observed, testing is the phase where the errors remaining from the earlier phases also must be detected. Hence, testing performs a very critical role for quality assurance and for ensuring the reliability of software.
KeywordsEquivalence Class Functional Testing Structural Testing Unit Testing Software Reliability
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