Finding defects is only 1/2 the job for a tester and it isn’t the most important. The most important job is getting bugs fixed. The Tester isn’t directly responsible for the fix but an effective tester will 1) find test cases that make the defect so readily apparent the developer can’t say it is not going to happen and 2) works effectively with the developers describing the condition and getting defect fixed. The goal of testing isn’t simply to find bugs, it is to ensure that quality software gets shipped. Still a tester’s job is to find defects, to attack the program from every angle, it isn’t just a validation job. But ultimately a found bug that is rejected, reprioritized, and not fixed produces a suboptimal result. It takes teamwork and a skill to find bugs and get them fixed. This is one of the reasons a move to centralized test factories requires very strong collaboration skills and tools – centralization will stress any communication gaps and those gaps are the cracks through which defects fall into production.