Much uncertainty

In some cases, there is much uncertainty as to where the risks lie. This makes it difficult to determine a good strategy and to choose the right techniques. There are two possible solutions to this:

• Exploratory testing, because this has the flexibility to zoom in as necessary during the test execution on where the risk areas appear to be
• Employing the “onion” model. With this, somewhat general tests are specified in advance, but time and budget are planned for creating additional and targeted deeper-level tests during the test execution as the areas of risk become clearer. The testing thus progresses to a deeper layer each time.