A test strategy is the set of ideas that guides your test design. It's what explains why you test this instead of that, and why you test this way instead of that way. Strategic thinking matters because testers must make quick decisions about what needs testing right now and what can be left alone. You must be able to work through major threads without being overwhelmed by tiny details. James Bach describes how test strategy is organized around risk but is not defined before testing begins. Rather, it evolves alongside testing as we learn more about the product. We start with a vague idea of our strategy, organize it quickly, and document as needed in a concise way. In the end, the strategy can be as formal and detailed as you want it to be. In the beginning, though, we start small. If you want to focus on testing and not paperwork, this approach is for you.