During classification, typically the users of the tool consider the integration of the software tool within the context of their specific product development process – based on what is referred to as the Tool Confidence Level (TCL).
The user analyzes the probability that a potential error in the tool will have a direct impact on the functional safety of the system under development. Besides examining the tools being used themselves, the development methodology, verification and validation measures (e.g. review and testing) of the product to be developed are also considered. A final classification can only be made in the context of a specific product development process.