Outputs (35)

Assisted assignment of automotive safety requirements (2013)
Journal Article
Azevedo, L. D. S., Parker, D., Walker, M., Papadopoulos, Y., & Araújo, R. E. (2014). Assisted assignment of automotive safety requirements. IEEE Software, 31(1), 62-68. https://doi.org/10.1109/ms.2013.118

ISO 26262, a functional-safety standard, uses Automotive Safety Integrity Levels (ASILs) to assign safety requirements to automotive-system elements. System designers initially assign ASILs to system-level hazards and then allocate them to elements o... Read More about Assisted assignment of automotive safety requirements.

Quantification of priority-OR gates in temporal fault trees (2012)
Presentation / Conference Contribution
Edifor, E., Walker, M., & Gordon, N. Quantification of priority-OR gates in temporal fault trees

Fault Tree Analysis has been used in reliability engineering for many decades and has seen various modifications to enable it to analyse fault trees with dynamic and temporal gates so it can incorporate sequential failure in its analysis. Pandora is... Read More about Quantification of priority-OR gates in temporal fault trees.

Compositional synthesis of temporal fault trees from state machines (2012)
Journal Article
Papadopoulos, Y., Walker, M., & Mahmud, N. (2012). Compositional synthesis of temporal fault trees from state machines. Performance Evaluation Review, 39(4), 79-88. https://doi.org/10.1145/2185395.2185444

Dependability analysis of a dynamic system which is embedded with several complex interrelated components raises two main problems. First, it is difficult to represent in a single coherent and complete picture how the system and its constituent parts... Read More about Compositional synthesis of temporal fault trees from state machines.

Integrated safety and architecture modeling for automotive embedded systems (2011)
Journal Article
Chen, D., Johansson, R., Lönn, H., Blom, H., Walker, M., Papadopoulos, Y., Torchiaro, S., Tagliabo, F., & Sandberg, A. (2011). Integrated safety and architecture modeling for automotive embedded systems. Elektrotechnik und Informationstechnik : E & I, 128(6), 196-202. https://doi.org/10.1007/s00502-011-0007-7

EAST-ADL is an architecture description language (ADL) for model-based development of automotive embedded systems. The formalization of domain-specific engineering information and methodology brings a potential for a wide range of benefits for inform... Read More about Integrated safety and architecture modeling for automotive embedded systems.

Capture and reuse of composable failure patterns (2010)
Journal Article
Wolforth, I., Walker, M., Papadopoulos, Y., & Grunske, L. (2010). Capture and reuse of composable failure patterns. International Journal of Critical Computer-Based Systems, 1(1/2/3), 128-147. https://doi.org/10.1504/IJCCBS.2010.031710

Emerging safety analysis techniques use composition of failure models or fault simulation in formal models of a system to determine relationships between the causes and effects of failure. Most recent work has focused on developing system modelling a... Read More about Capture and reuse of composable failure patterns.

Automatic allocation of safety integrity levels (2010)
Presentation / Conference Contribution
Papadopoulos, Y., Walker, M., Reiser, M.-O., Weber, M., Chen, D., Törngren, M., Servat, D., Abele, A., Stappert, F., Lonn, H., Berntsson, L., Johansson, R., Tagliabo, F., Torchiaro, S., & Sandberg, A. (2010, April). Automatic allocation of safety integrity levels. Presented at Proceedings of the 1st Workshop on Critical Automotive applications Robustness & Safety - CARS '10

In this paper, we describe a concept for the automatic allocationof general Safety Integrity Levels (SILs) to subsystems andcomponents of complex hierarchical networked architectures thatdeliver sets of safety critical functions. The concept is gener... Read More about Automatic allocation of safety integrity levels.

A hierarchical method for the reduction of temporal expressions in Pandora (2010)
Presentation / Conference Contribution
Papadopoulos, Y., & Walker, M. A hierarchical method for the reduction of temporal expressions in Pandora. Presented at Proceedings of the First Workshop on DYnamic Aspects in DEpendability Models for Fault-Tolerant Systems - DYADEM-FTS '10

Fault Tree Analysis (FTA) is a popular safety analysis technique used to determine the logical combination of events needed to cause a particular system failure. However, FTA is purely combinatorial and cannot analyse the effects of sequences of even... Read More about A hierarchical method for the reduction of temporal expressions in Pandora.

Engineering failure analysis and design optimisation with HiP-HOPS (2010)
Journal Article
Papadopoulos, Y., Walker, M., Parker, D., Rüde, E., Hamann, R., Uhlig, A., Grätz, U., & Lien, R. (2011). Engineering failure analysis and design optimisation with HiP-HOPS. Engineering Failure Analysis, 18(2), 590-608. https://doi.org/10.1016/j.engfailanal.2010.09.025

The scale and complexity of computer-based safety critical systems, like those used in the transport and manufacturing industries, pose significant challenges for failure analysis. Over the last decade, research has focused on automating this task. I... Read More about Engineering failure analysis and design optimisation with HiP-HOPS.

A translation of state machines to temporal fault trees (2010)
Presentation / Conference Contribution
Papadopoulos, Y., Mahmud, N., & Walker, M. (2010, June). A translation of state machines to temporal fault trees. Presented at 2010 International Conference on Dependable Systems and Networks Workshops (DSN-W)

State Machines (SMs) are increasingly being used to gain a better understanding of the failure behaviour of safety-critical systems. In dependability analysis, SMs are translated to other models, such as Generalized Stochastic Petri Nets (GSPNs) or c... Read More about A translation of state machines to temporal fault trees.

Generalizable safety annotations for specification of failure patterns (2010)
Journal Article
Papadopoulos, Y., Walker, M., Grunske, L., & Wolforth, I. (2010). Generalizable safety annotations for specification of failure patterns. Software: Practice and Experience, 40(5), 453-483. https://doi.org/10.1002/spe.966

Components in programmable systems often exhibit patterns of failure that are independent of function or system context. In this paper, we show that it is possible to capture, and reuse where appropriate, such patterns for the purposes of system safe... Read More about Generalizable safety annotations for specification of failure patterns.