Extensive testing means testing an application thoroughly.
NEED : Involvement of High Risk In implementation Amount of testing to be performed on a component/system will be determined by the risk associated with placing the software into operation. If the risk is minimal decision may be made not to test. If the risk is high, extensive testing may be required.
Actor : This is done by testers(independent) because developers are optimistic in their ability to do defect- free work and thus underestimate the need of extensive testing.
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