The approval process of interlocking systems in all European countries requires compliance with the CENELEC standards EN 50126-1, EN 50126-2, EN 50128 and EN 50129. Elsewhere in the world, these standards are reflected by IEC 62278, IEC 62779 and IEC 62280. Together, they describe the lifecycle process for safety-related rail-based transport systems (GTS). This video provides an introduction to the process to be followed when developing standards-compliant software and explains how automation can help to minimize the overhead involved.

00:00 Welcome
00:10 What is functional safety?
00:28 Functional safety standards and the EN 5012X series
01:43 Software development life cycle EN 50128 §15.3.2.1
02:35 Safety Integrity Levels (SILs) and their impact
03:14 Bidirectional traceability
04:15 System development phase (EN 50126)
04:44 Software requirements phase (EN 50128 §7.2) and automated requirements traceability
05:19 Software planning phase (EN 50128 §5.3)
05:30 Software architecture and design phase (EN 50128 §7.3) and implementation review
06:16 Design phase of software components (EN 50128 §7.4)
06:53 Coding rules and guidelines (EN 50128 §7.2.1.2) and automated conformity testing
07:46 Dynamic analysis (EN 50128 Tables A.5, A.13 and A.13) and its automated implementation
08:38 Implementation of the design and testing of the code (EN 50128 §7.5, §7.6, §7.7)
08:56 Tool qualification (EN 50128 §6.7)
09:18 Summary and concluding remarks

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