A Systematic Approach to Safety Case Maintenance
SAFECOMP '99 Proceedings of the 18th International Conference on Computer Computer Safety, Reliability and Security
On arguing the safety of large systems
SCS '05 Proceedings of the 10th Australian workshop on Safety critical systems and software - Volume 55
Safety, software architecture and MIL-STD-1760
SCS '06 Proceedings of the eleventh Australian workshop on Safety critical systems and software - Volume 69
Applying Safety Goals to a New Intensive Care Workstation System
SAFECOMP '08 Proceedings of the 27th international conference on Computer Safety, Reliability, and Security
Goal-based safety cases for medical devices: opportunities and challenges
SAFECOMP'07 Proceedings of the 26th international conference on Computer Safety, Reliability, and Security
| Hi-index | 0.01 |
The HEAT/ACT project consists of replacing the conventional mechanical flight control system of a helicopter with a fly-by-wire system. With such a project, the safety concerns are obvious, and therefore the development of a thorough and convincing Safety Case is paramount. The project therefore chose to adopt a phased approach to safety case development, beginning with a Preliminary Safety Case (PSC). Goal Structuring Notation (GSN) was chosen as the development method for the PSC, because of its perceived merits of ease of construction and clarity of review.This work was first reported in a presentation at the UK Safety Critical Systems Symposium (SSS'04), which described the initial development of the PSC argument structure, and investigated some of the practical issues identified in using GSN.This paper revisits the HEAT/ACT project. It reprises the original construction of the GSN argument, and goes on to show how the PSC has developed and evolved since that initial development phase. It examines how the GSN argument has been used in the interaction with other partners and sub-system suppliers involved in the HEAT/ACT project, and considers whether the effort expended in developing the PSC has lived up to expectations in its contribution to safety process management.