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doc: safety: Extend safety overview with IEC 61508 infomation

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Extend the safety overview with information about the IEC 61508 standard
and why it was chosen for zephyr.
Add a new diagram which shows relations between the IEC 61508
and other standards.

Signed-off-by: Simon Hein <Shein@baumer.com>
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Simon Hein 2024-09-17 18:29:18 +02:00 • committed by Anas Nashif
commit e401b80b61
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@ -85,6 +85,24 @@ implementation of safety-related systems that aims to reduce the risk of acciden
overall safety. By following the standard, organizations can ensure that their safety-related overall safety. By following the standard, organizations can ensure that their safety-related
systems are designed and implemented to the highest level of safety integrity. systems are designed and implemented to the highest level of safety integrity.
Why IEC 61508?
==============
The IEC 61508 standard was selected because it serves as a foundational functional safety standard
applicable across various industry sectors. It provides a robust framework that can be used as
base for specific standards for different industries. This makes IEC 61508 particularly relevant
for Zephyr, as the operating system's versatility allows it to be effectively utilized across a
wide range of industry sectors.
The following diagram illustrates the relationship between the IEC 61508 standard and other related
standards:
.. figure:: images/IEC-61508-basis.svg
:align: center
:alt: IEC 61508 relation to other standards
:figclass: align-center
IEC 61508 relation to other standards
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