No abstract

Nowadays, safety-critical systems are used in various domains including Internet of Things of medical devices. However, such systems are usually very complex and fault-prone. This means, safety, security and real-time aspects are often only insufficiently considered. To mitigate or avoid safety-critical failures, it is mandatory to analyze effects by means of a failure and change impact analysis. In this paper, we propose an approach to analyze a hierarchical structured model to determine critical goals. Afterwards, the effects and impacts of failures are calculated and determined to identify components which have a need of counter measures. Furthermore, it is analyzed which kind of effects these counter measures will have within the hierarchical model. Finally, the developed approach is evaluated by means of a realistic medical use case.

Nowadays, modern cars can be configured by means of a wide range of software configuration options. In this context, we speak about Software Product Lines (SPLs). In almost every modern automotive vehicle safetycritical components like, e.g., an Adaptive Cruise Control (ACC) are installed. Some SPLs have different safety-critical requirements whereas other SPLs have similar requirements. This paper proposes an approach for the reduction of the complexity of SPLs without loss of safety (aspects) for all participants. For this purpose, a concept has been developed, which clusters products of SPLs with similar safety-critical requirements, i.e., the set of products of an SPLs, which must still be tested, can be reduced immensely. The paper also provides an application example how the reduced set can be used in order to perform a Safety, Security and Timing (SST) based trade-off analysis.

Nowadays, modern cars can be configured by means of a wide range of software configuration options. In this context, we speak about Software Product Lines (SPLs). In almost every modern automotive vehicle safetycritical components like, e.g., an Adaptive Cruise Control (ACC) are installed. Some SPLs have different safety-critical requirements whereas other SPLs have similar requirements. This paper proposes an approach for the reduction of the complexity of SPLs without loss of safety (aspects) for all participants. For this purpose, a concept has been developed, which clusters products of SPLs with similar safety-critical requirements, i.e., the set of products of an SPLs, which must still be tested, can be reduced immensely. The paper also provides an application example how the reduced set can be used in order to perform a Safety, Security and Timing (SST) based trade-off analysis.