The Generic Hazard List work was started early in 2005 with a contract between the Technical University of Braunschweig and the UIC Euro-Interlocking Project in Zurich.
Phase 1 involved the generation of a document outlining the processes to be used in identifying hazards related to railways in general and especially in relation to signalling and interlocking systems. This opening document provided the foundation for generation of the Generic Hazard List in 2005-06 and the completed article was circulated to the railways for evaluation late in 2005. The Generic Hazard List complete with cross reference tables to the Euro-Interlocking functional requirements in existence at the time was published in March 2006 and again circulated to the participating railways.
An offshoot of this was the generation of a process of inversion of each hazard to generate a High Level Safety Requirement. This was completed on a one-to-one basis, and shortly afterwards the University of Braunschweig completed the cross referencing work between the hazards, a more complete set of functional requirements and the completed high level safety requirements. This not only gave an updated picture of the Hazard List itself but ensured that no “holes” were found between the functions and the generic safety requirements for the systems.
Finally in May 2006 all the documents produced were placed under DOORS control, and the cross references provided in DOORS by means of the “Linking” facility. With close agreement between the teams this work was completed in June 2006 and the final documents issued to the railways for their comments. To date one set of comments has been received; those from REFER REFER Infrastructure Manager from Portugal Portuguese Railways, and more would be appreciated in order to have the widest possible acceptance for the processes.
The remaining work consists largely of ensuring that new or revised functional requirements must be entered and linked (or remain linked), and that changes to and the development of the requirements process do not proceed without reference to those hazard processes already commenced.
There is one other task remaining that involves the previous set of EI High Level Requirements. When the Generic Process and its data have been accepted, the original high level data will require to be revised to avoid duplication. These requirements furthermore require changes to bring them into line with the revised project processes. The recommended changes have been discussed and agreed at the Euro-Interlocking Steering Groups and it remains for the DOORS data to be revised and re-issued for agreement and acceptance.