TY - GEN A1 - Höfig, Kai A1 - Zeller, Marc T1 - Automated Qualification of a Safety Critical System N2 - A method for automated qualification of a safety critical system including a plurality of components is provided. A functional safety behavior of each component is represented by an associated component fault tree element. The method includes automatically performing a failure port mapping of output failure modes to input failure modes of component fault tree elements based on a predetermined generic fault type data model stored in a database. KW - Automated qualification KW - Safety-critical systems KW - Fault trees Y1 - 2016 N1 - US Patent App. 14/644,119 ER - TY - GEN A1 - Höfig, Kai T1 - Automated Recertification of a Safety Critical System N2 - A method for automated recertification of a safety critical system with at least one altered functionality is provided. The method includes providing a failure propagation model of the safety critical system. The method also includes updating the failure propagation model of the safety critical system according to the at least one altered functionality using inner port dependency traces between inports and outports of a failure propagation model element representing the at least one altered functionality. The method includes calculating top events of the updated failure propagation model, and comparing the calculated top events with predetermined system requirements to recertify the safety critical system. KW - Automated recertification KW - Safety-critical systems Y1 - 2016 N1 - US Patent App. 14/586,818 ER - TY - GEN A1 - Guo, Zhensheng A1 - Höfig, Kai T1 - Integrated Model-Based Safety Analysis N2 - A method for integrated model-based safety analysis includes integrating a safety analysis model into a system development model of a safety-critical system. The system development model includes model components. The safety analysis model models a failure logic separately for each of the model components. The method includes representing dependencies among the model components with a design structure matrix. The design structure matrix represents each of the model components with a row and a column and shows dependencies between model components with corresponding entries. The method also includes sequencing the design structure matrix, and identifying at least one dependency loop and loop components in the sequenced design structure matrix. The loop components are part of the at least one dependency loop. KW - Integrated model-based safety analysis KW - Safety-critical systems Y1 - 2015 N1 - US Patent App. 14/066,403 ER -