A Layered Model for Structuring Automotive Safety Arguments (Short Paper)

Birch, John; Rivett, Roger; Habli, Ibrahim; Bradshaw, Ben; Botham, John; Higham, Dave; Monkhouse, Helen; Palin, Robert

doi:10.1109/edcc.2014.24

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…It can be seen in literature that many criteria are applied to identify layers, but usually they are not explicitly defined. A typical way is using the types of system elements, e.g., logical and physical (Ni et al 2013), hardware and behavioural (Guldenmund et al 2006), or their properties (Birch et al 2014;Gill, Kadziński 2012). Cheng et al (2014) proposed a three-layered model to analyse and recognise the activities of a group of people, where the type of interactions is used to distinguish layers.…”

Section: Layers In Maintenance Modellingmentioning

confidence: 99%

Maintenance Layers for Railway Infrastructure in Poland

2021

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The railway network in Poland with over 19000 km is one of the biggest in the European Union (EU). At the same time safety indicators collected by the European Union Agency for Railways (ERA) show that it is one of the least safe in Europe. Consequently, all the actions taken in safety management of Polish Railways are particularly important for the society. In 2015, there was a change in the main infrastructure manager’s rulebook on track maintenance. A new process rule was introduced to replace a large set of long-established action rules. However, supervision reports of the Polish National Safety Authority indicate that the new rule is not used properly. Therefore, the current process of taking maintenance decisions on Polish Railways was described and a novel concept of maintenance layers and Maintenance Board meetings was proposed. The change would allow to choose the order of maintenance activities in a more objective way than it is done nowadays, without the necessity to make any major investments.

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Section: Layers In Maintenance Modellingmentioning

confidence: 99%

Maintenance Layers for Railway Infrastructure in Poland

2021

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“…Our standpoint here is somewhat similar: without an explicit and adequate representation of a safety case, its analysis is close to impossible, as is the impact that design changes may have on safety. Works such as [2,3,8,19] also stress the importance of having an explicit representation of a safety case. However, in comparison to ours, these works are focused on what a safety case should look like, not on the problems with an incremental approach to safety assurance.…”

Section: Related Workmentioning

confidence: 99%

“…The situation is radically different once one assumes safety properties are defeasible, as we have discussed in Sect. 3. In such a setting, the traditional ideas of refinement do not apply straightforwardly (e.g., it may be the case that refining a safety goal into two safety subgoals results in one of the subgoals undermining the other).…”

Section: Related Workmentioning

confidence: 99%

Is Current Incremental Safety Assurance Sound?

Cassano

Grigorova

Singh

et al. 2015

Lecture Notes in Computer Science

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Incremental design is an essential part of engineering. Without it, engineering would not likely be an economic, nor an effective, aid to economic progress. Further, engineering relies on this view of incrementality to retain the reliability attributes of the engineering method. When considering the assurance of safety for such artifacts, it is not surprising that the same economic and reliability arguments are deployed to justify an incremental approach to safety assurance. In a sense, it is possible to argue that, with engineering artifacts becoming more and more complex, it would be economically disastrous to not "do" safety incrementally. Indeed, many enterprises use such an incremental approach, reusing safety artifacts when assuring incremental design changes. In this work, we make some observations about the inadequacy of this trend and suggest that safety practices must be rethought if incremental safety approaches are ever going to be fit for purpose. We present some examples to justify our position and comment on what a more adequate approach to incremental safety assurance may look like.

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Safety Standards: Chronic Challenges and Emerging Principles

Habli¹

2017

Handbook of Safety Principles

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A Layered Model for Structuring Automotive Safety Arguments (Short Paper)

Cited by 5 publications

References 9 publications

Maintenance Layers for Railway Infrastructure in Poland

Maintenance Layers for Railway Infrastructure in Poland

Is Current Incremental Safety Assurance Sound?

Safety Standards: Chronic Challenges and Emerging Principles

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