Tutorials

Critical thinking is the kind of thinking that specifically looks for problems and mistakes. Regular people don't do a lot of it. However, if you want to be a great tester, you need to be a great critical thinker, too. Critically thinking testers save projects from dangerous assumptions and ultimately from disasters. The good news is that critical thinking is not just innate intelligence or a talent—it's a learnable and improvable skill you can master.

Traditional test plans are incompatible with agile software development because we don't know all the details about all the requirements up front. However, in an agile software release, you still must decide what types of testing activities will be required—and when you need to schedule them. Janet Gregory explains how to use the Agile Testing Quadrants, a model identifying the different purposes of testing, to help your team understand your testing needs as you plan the next release.

Exploratory testing is an approach to testing that emphasizes the freedom and responsibility of testers to continually optimize the value of their work. It is the process of three mutually supportive activities done in parallel: learning, test design, and test execution. With skill and practice, exploratory testers typically uncover an order of magnitude more problems than when the same amount of effort is spent on procedurally scripted testing. All testers conduct exploratory testing in one way or another, but few know how to do it systematically to obtain the greatest benefits.

The nature of exploration, coupled with the ability of testers to rapidly apply their skills and experience, make exploratory testing a widely used test approach—especially when time is short. Unfortunately, exploratory testing often is dismissed by project managers who assume that it is not reproducible, measurable, or accountable. If you have these concerns, you may find a solution in a technique called session-based test management (SBTM), developed by Jon Bach and his brother James to specifically address these issues.