Testing is the most important technique in assuring the quality of software. If an error is present in a delivered application, the consequential loss amounts to many times the cost of actually repairing the software. Regular testing during development gives the project manager firm information on which to base plans and predictions for the remainder of the project,' he said. But testing is not just about checking the functional correctness of an application. Load and performance testing are just as critical as functional accuracy in many applications.
Users perceive slow software as dead software.
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