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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.

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• 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?

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