Do testers really prevent bugs?

Testing the Mind

The question of whether testers prevent bugs or find them is a fairly regular tester conversation.

When you find a bug in the software you have clearly found a bug. It makes no difference whether you were actively testing the software, trying to use the software, or simply clicking around randomly, by performing some actions and recognising that a problem occurred you were testing.

Many testers do much more than testing the actual software product and many want to somehow define what these additional things are. Actions like reviewing requirements, planning releases, training users can all fall to testers. So at what point does testing really start?

Richard Bradshaw argues that finding a bug in the requirements is still just finding a bug. You might have found it earlier but you hadn’t prevented it. A mistake in requirements can still be considered a bug. Your knowledge of the system, the…

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