IEC 61508 Functional Safety Assessment Emerson Process ... - Exida

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Management Summary This report summarizes the results of the functional safety assessment according to IEC 61508 carried out on the: Fisher Controls DVC6000 SIS Digital Valve Controller - DETT The functional safety assessment performed by exida Certification consisted of the following activities: - exida Certification assessed the development process used by Fisher Controls International, LLC through an audit and creation of a detailed safety case against the requirements of IEC 61508. - exida Certification reviewed and assessed a detailed Failure Modes, Effects, and Diagnostic Analysis (FMEDA) of the devices to document the hardware architecture and failure behavior. The functional safety assessment was performed to the requirements of IEC 61508, SIL 3. A full IEC 61508 Safety Case was prepared, using the exida SafetyCaseDB tool, and used as the primary audit tool. Hardware and software process requirements and all associated documentation were reviewed. Environmental test reports were reviewed. Also the user documentation (safety manual) was reviewed. The results of the Functional Safety Assessment can be summarized by the following statements: The Fisher Controls DVC6000 SIS Digital Valve Controller - DETT was found to meet the requirements of SIL 3. The manufacturer will be entitled to use the Functional Safety Logo. The manufacturer may use the mark: © exida Certification SA. EFC 07-07-41 R002 V1R2 IEC 61508Assessment.doc, March 13, 2008 Iwan van Beurden Page 2 of 19
Table of Contents Management Summary ...................................................................................................2 1 Purpose and Scope ...................................................................................................4 2 Project management..................................................................................................5 2.1 exida.............................................................................................................................. 5 2.2 Roles of the parties involved.......................................................................................... 5 2.3 Standards / Literature used............................................................................................ 5 2.4 Reference documents.................................................................................................... 5 2.4.1 Documentation provided by Fisher Controls International, LLC.......................... 5 2.4.2 Documentation generated by exida Consulting and exida Certification ............ 7 3 Product Description....................................................................................................8 3.1 Scope of Analysis......................................................................................................... 11 4 IEC 61508 Functional Safety Assessment...............................................................12 4.1 Methodology ................................................................................................................ 12 4.2 Assessment level ......................................................................................................... 12 5 Results of the IEC 61508 Functional Safety Assessment ........................................13 5.1 Lifecycle Activities and Fault Avoidance Measures ..................................................... 13 5.1.1 Functional Safety Management......................................................................... 13 5.1.2 Safety Requirements Specification and Architecture Design ............................ 14 5.1.3 Hardware Design............................................................................................... 14 5.1.4 Validation........................................................................................................... 14 5.1.5 Verification......................................................................................................... 15 5.1.6 Modifications ..................................................................................................... 15 5.1.7 User documentation .......................................................................................... 15 5.2 Hardware Assessment................................................................................................. 16 6 Terms and Definitions ..............................................................................................18 7 Status of the document ............................................................................................19 7.1 Liability ......................................................................................................................... 19 7.2 Releases ...................................................................................................................... 19 7.3 Future Enhancements.................................................................................................. 19 7.4 Release Signatures...................................................................................................... 19 © exida Certification SA. EFC 07-07-41 R002 V1R2 IEC 61508Assessment.doc, March 13, 2008 Iwan van Beurden Page 3 of 19
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IEC 61508 Functional Safety Assessment Emerson Process ... - Exida

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