Software Testing Unleashed · 2026-07-30 · 21 min
A tester on why predicting production failures is impossible Free e-book: The 7 success factors of software testing. 25 years of project experience in one 33-page workbook, now also in English Get it for free "Testing is not about preventing errors anymore in the complex world is to learn about what is working and what is not working." - Jean-Francois Riverin With Jean-Francois Riverin I get into a question that bothered him for over 20 years: why are there still bugs in production even when you tested as well as you possibly could? His answer is that software stopped being a complicated problem, like building a bridge, a long time ago. It is now complex, more like medicine or meteorology, and that means the whole idea of finding the right answer through testing is the wrong goal. We talk about what it looks like to switch that mindset, what "safe to fail" means in practice, and how to make that argument to a manager who still expects predictable budgets and zero surprises on Friday afternoons.
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