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Chapter 5. Verification and Validation
5.1. Applicable and Related Standards
For the development of safety-critical systems exist several (industrial) standards. Figure 5.1
introduces those standards relevant for this work, which will be roughly discussed in the
following:
Standards for Train Systems
EN 50128
DO-178B
EN 50129
references
references
EN 50126
relates
relates
DIN EN 61508
Figure 5.1.: Standards for the development of safety-critical systems
DIN EN 61508
EN 50128
Functional safety of electrical / electronic/ programmable electronic safetyrelated
systems: The DIN EN 61508 is a general standard, which is applicable
to all safety relevant electrical, electronic, and programmable electronic
systems. It can be interpreted as a superior standard [19].
Railway applications – Communications, signalling and processing systems
– Software for railway control and protection systems: The EN 50128 is a
specialised standard for software for train control systems. It refers to the
EN 50129 and EN 50126 [11].
EN 50129 Railway applications – Communication, signalling and processing systems –
Safety related electronic systems for signalling: The EN 50129 is a specialised
standard for communication, signalling, and processing in train systems. It
is related to the DIN EN 61508 and bases partly on it [13].
EN 50126
DO-178B
Railway applications – The specification and demonstration of Reliability,
Availability, Maintainability and Safety (RAMS): The EN 50126 is a standard
for safety and reliability aspects in the field of train operators. It is also
related to the DIN EN 61508 because its analysis procedures are based on
it [10].
Software Considerations in Airborne Systems and Equipment Certification:
The DO-178B is a standard developed by the RTCA for software for airborne
systems in general [74].
Although this is obviously not an applicable standard for the railway domain,
it is used in this document to additionally introduce techniques and
methodologies from other domains.
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