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Copyright © 2015 exida
BSChE, University of Delaware
PhD, Chemical Engineering, Princeton University
Process Engineer - Mobil and Air Products (10 yrs)
exida Partner since start up in 2000
IEC 61511, IEC 61508, IEC 62061, EN13849 Consulting
Specialties in HAZOP, SIL Selection, LOPA, ALARP,
Functional Safety Management and Assessment, and
all associated training
Author of ISA “Safety Integrity Level Selection” and
exida “Practical SIL Target Selection” textbooks
exida
Main Offices
Regional Offices
Sales Offices
www.cfse.org
http://www.exida.com/
ALARM Management
PHAx™
SIL Selection Tool
Hazard Matrix or Risk Graph
Layers of Protection Analysis built-in
Safety function documentation
SRS Tool
SIL Verification Tool
Direct average calculation engine
Instrumentation failure database built-in
Variables include reality – test coverage, service
Proof Test Specification
SILStat™ – Data Collection Tool
o exida authored most
industry references for
automation safety and
reliability
o exida authored industry
data handbook on
equipment failure data
o exida authored the most
comprehensive book on
functional safety in the
market.
www.exida.com
• The Functional Safety standards so far
• Things that have not changed
• Definition changes
• Other changes
All information in this webinar is based on IEC 61511 standard,
version 65A/691/CDV, 65A/692/CDV, and 65A/693/CDV,
originally circulated in May 2014 and approved in August 2014
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Prescriptive (Clear design, variable safety)
Performance (Clear safety, optimal design)
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Copyright exida.com LLC 2001-2015
Tolerable Risk
Set Point
Analysed Risk
Safety Requirements
Specification and Other
Means of Risk Reduction
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Design and Build
Validate vs Spec
Operations Proof Testing
and SIS Demand Review
of Actual Risk
Equipment Modification
Request
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Low Demand High Demand Continuous
Use PFDavg Table Use PFH Table Use PFH Table
Take Credit for Proof
Testing
NO Credit for Proof
Testing unless HFT>0
NO Credit for Proof
Testing
*Take Credit for
Automatic Diagnostics
*Take Credit for
Automatic Diagnostics
NO Credit for Automatic
Diagnostics
* If fast enough
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• Questions regarding IEC 61511 2nd Edition?
• Questions regarding exida Services or Safety Lifecycle
tools?
http://support.exida. com