Functional Safety 2016

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Handout 9
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Page 18 InstMC Functional Safety 2016Conference
A more detailed example.
Coded Processing
Time redundancy Time
Diverse
Operation
Operation
Coding Comparison
Diverse
Operators
Operators
Diverse
Output
Output
Stop
If D ≠ /C
D = /C
C A, B
/A, /B
OR
AND
Time diversity and redundancy
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Page 19 InstMC Functional Safety 2016Conference
Achieving a Specific Systematic Capability for a Safety Product
Summary
• Comply with the general requirements of IEC 61508 for Functional Safety
Management
• Select and implement, with appropriate rigour, the techniques and
measures required to achieve the required Systematic Capability
• Include any necessary product requirements into the specification
• Document everything (including rationale for selection, evidence etc)
• Typically a 3rd party assessment by independent third party is used to
demonstrate requirements have been met