Integrating Manual and Automatic Risk Assessment for Risk-Based Testing

In this paper we define a model-based risk assessment procedure that integrates automatic risk assessment by static analysis, semiautomatic risk assessment and guided manual risk assessment. In this process probability and impact criteria are determined by metrics which are combined to estimate the risk of specific system development artifacts. The risk values are propagated to the assigned test cases providing a prioritization of test cases. This supports to optimize the allocation of limited testing time and budget in a risk-based testing methodology. Therefore, we embed our risk assessment process into a generic risk-based testing methodology. The calculation of probability and impact metrics is based on system and requirements artifacts which are formalized as model elements. Additional time metrics consider the temporal development of the system under test and take for instance the bug and version history of the system into account. The risk assessment procedure integrates several stakeholders and is explained by a running example.