Guidance for Use of CSM Recommendation - ERA - Europa

Risk Management
European Railway Agency
Collection of examples of risk assessments and of some possible tools
supporting the CSM Regulation
2. DESCRIPTION OF THE RISK ASSESSMENT PROCESS
2.1. General description - Correspondence between the CSM risk assessment
process and the CENELEC V-cycle
2.1.1. The risk assessment process is the overall iterative process that comprises:
(a) the system definition;
(b) the risk analysis including the hazard identification;
(c) the risk evaluation.
The risk assessment process shall interact with the hazard management according to
section 4.1.
[G 1] The risk management process covered by the CSM can be represented within a V-Cycle that
starts with the (preliminary) system definition and that finishes with the system acceptance:
see Figure 4. This simplified V-Cycle can be mapped then on the classical V-Cycle in
Figure 10 of the EN 50 126-1 standard {Ref. 8}. In order to show the correspondence of the
CSM risk management process in Figure 1, the CENELEC V-Cycle in Figure 10 is recalled in
Figure 5:
(a) the "preliminary system definition" of the CSM in Figure 1 corresponds to the Phase 1 in
CENELEC V-Cycle, i.e. to the definition of the system "concept" (see BOX 1 in
Figure 5);
(b) the "risk assessment" of the CSM in Figure 1 includes the following phases of the
CENELEC V-Cycle (see BOX 2 in Figure 5):
(1) Phase 2 in Figure 5: "system definition and application conditions";
(2) Phase 3 in Figure 5: "risk analysis";
(3) Phase 4 in Figure 5: "system requirements";
(4) Phase 5 in Figure 5: "apportionment of system requirements" down to the different
sub-systems and components.
²
Demonstration of Compliance
with the Safety Requirements
Preliminary
System
Definition
System
Acceptance
Safety
Requirements
(CSM)
Risk
Assessment
Figure 4 : Simplified V-Cycle of Figure 10 of EN 50 126 standard.
Reference: ERA/GUI/02-2008/SAF Version: 1.1 Page 32 of 105
File Name: Collection_of_RA_Ex_and_some_tools_for_CSM_V1.1.doc
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