Conference Papers

C.W. Johnson, Innovation vs Safety:  Hazard Analysis Techniques to Avoid Premature Commitment during the Early Stage Development of National Critical Infrastructures, International Systems Safety Conference, St Louis, MO, USA, 4-8 August 2014.

* Abstract

Preliminary hazards analysis techniques help to identify safety concerns during the early stages of development.

However, they often rely on scoping studies and functional decompositions that can be hard to sustain without premature commitment to particular software architectures. For example, small alterations to the high-level design of a critical infrastructure force radical change in the underlying hazard analysis. This creates tensions – safety managers can become “enemies of innovation” if they oppose modifications that create additional work redoing the hazard analysis. Equally, it can be hard for safety managers to control project costs if alterations to the underlying architecture force continual changes in the safety assessments. These tensions are compounded because many hazard analysis techniques have their roots in the 1960s when issues of scale, modularity and reuse were arguably less of a concern than they are today. These arguments are illustrated by the EATS project on Advanced Testing and Smart Train Positioning System for the next generation European Train Control System. This integrates a range of wireless infrastructures with input from Satellite Based Augmentation Systems to reduce reliance on trackside infrastructures. However, the dynamic, multidisciplinary nature of the work has created a need for continuous feedback on potential safety concerns as lab and bench studies continue to innovate with novel software architectures and prototype implementations. We present a number of approaches that can be used to balance the need for design commitment to support safety assessments and the flexibility required in early stage development of critical national infrastructures.







Project acronym

Project title
 ETCS Advanced Testing and Smart Train Positioning System

Project reference

Project coordinator
CEIT (Centro de Estudios e Investigaciones Técnicas)

Start date: 01/10/2012
End date: 31/03/2016

Sponsored by

FP7 logo