Developers - Testers Ratio

Many of us would like a precise answer to the question: "What's the correct staffing ratio for developers to testers in any product development organization?" Usually though, the only answer is "It depends". The developer to tester ratios range from 1:1.5 to 10:1, including organizations, such as Microsoft, which have ratios that are 1:1.

The more capable your developers, the fewer testers you need. The more capable your testers, the fewer testers you need. If you hire developers who don't test their work, or if you hire all one kind of tester, and they can't test the product in depth, you will need more testers.

So, the size of testing team depends more on the skills and attitude of developers and diversified skills of testers.

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