Why independence? For a complex or safety critical projects: -Multiple levels of testing -Some or all of the levels done by independent testers Development staff may -Participate in testing,especially at lower levels -Limit their effectiveness since lack of objectivity Independent tester should have clear direction -Have the authority to require and define test processes and rules -Take on such process-related roles 同濟大学 SoftwareTesting 15/6/8 5 TONGJI UNIVERSITY Software Testing Why independence? 15/6/8 5 For a complex or safety critical projects: – Multiple levels of testing – Some or all of the levels done by independent testers Development staff may – Participate in testing, especially at lower levels – Limit their effectiveness since lack of objectivity Independent tester should have clear direction – Have the authority to require and define test processes and rules – Take on such process-related roles