3BUS092094 a en System 800xA Safety Lifecycle Services Overview

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Statistics are published and compared, incidents make headlinenews and many management incentives are based on saetyperormance. Todays industry strives to improve perormance andprotability while maintaining and improving saety. The challengesinclude unremitting pressure to reduce costs, shorter product lie-cycles, the need to reach the marketplace aster than ever, pressureto maximize the use o the asset base and plant availability, andpressure to reduce spurious alarms. In addition, there are increasingregulatory and social requirements or saety, reliability, ulldocumentation at all times and decision traceability.

With increasing reliance placed on smart equipment, the processindustries are demanding closer integration o their control andsaety solutions, reusable saety components and subsystems, saetysystem certication, automated tools and unctional saety.

ABB oers a complete Saety Instrumented System (SIS) that

complies with IE Complementing its saety system oerings, ABBSaety Liecycle Services provide a wide range o oerings that areounded on a proven knowledge o the saety engineering issuesrom an end user/operator perspective. ABB Saety Services assistin the practical implementation o all phases o the IEC 61508/61511saety liecycle or both existing and new acilities by applyingproven techniques, working methods, and tools including saetyassessments, saety liecycle audits, saety validation and verication,and saety training.

IndustrialITSystem 800xASaety Liecycle Services

Overview

Features and Benefts

Create Value by Protecting People,

Property and Environment. ABBprovides a portolio o tools and servicesor the ull asset/saety lie cycle:

Safety Requirements: Conductingthe right analysis at the right time inthe right way by providing ront endhazard and risk analysis and saety

requirements/SIL analysis.

Safety Systems Implementation:Designing saety systems that meetcustomers needs, specic SILrequirements, and ulll regulatoryrequirements and providing supportor installation, commissioning andoperations.

Maintaining Safety Performance:

Providing methods and tools tooptimize operations and maintenance

regimes and maintain saetyperormance.

Functional Safety Management:Providing clients with a total liecycle saety capability, mapped tothe IEC 61508/61511 asset and saetylie cycle. ABBs experience andstanding in the international saetymarket provides clients with a totalsolution a unique blend o saetyconsultancy, systems, services andsupporting tools.

Functional Saety RegulatoryCompliance and Good Practice


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Introduction

Figure 1. Supporting Techniques or the Functional Saety Liecycle

ABBs Saety Liecycle Services, as described in this document, include a portolioo trusted methods, tools and techniques to support the saety lie cycle concept.This enables organizations to cost eectively meet international regulations, codes o

practice, and comply with industry best practice international standards and saetymanagement systems.

Prot and saety are inextricably linked. ABB, with 800xA Saety Systems andits associated Saety Liecycle Services, supports a companys strategic goals omaintaining saety perormance, increasing protability, shareholder value, andlimiting liability and exposure.

The International Standard, IEC 61508 covers the unctional saety o electrical,electronic and programmable electronic systems and constitutes good practice orinstrumented protective systems. The standard, increasingly used as a good practicebenchmark, is a pre-cursor to a more robust approach or industry to demonstrate

that appropriate reliability, unctionality and perormance are built into equipmentand that it is maintained eectively. IEC 61511 is used as the vehicle to interpretthe ramework o IEC 61508 specic to the process industries. There are our keyconcepts involved in IEC 61508 (Figure 1):

The safety lifecycle. A sequence o phases providing a logical path throughto commissioning, operation, maintenance and nally decommissioning.

Safety management. A ormal saety plan produced to ensure that everythingis in place in order to prepare or and manage each phase o the saety lie cycle.

The design of safety related control and protective systems.Comprehensive technical guidance is given on appropriate measures andtechniques or achieving specied levels o integrity in the systems, including

the sae application o modern programmable electronics.

Competencies. Guidance on the appropriate skills and knowledge or thoseinvolved in each phase o the saety lie cycle.

Input o practical techniques based upon

hands-on knowledge o operating systems

Manage

Lie-Cycle

Responsibilities

and

competence

Summarise

process andplant

Input o practical techniques based upon

hands-on knowledge o operating systems

Hazard

identifcation andrisk analysis

Specifcation

o protectivesystems

Create

protection

Install

andvalidate

Operate, test

andmaintain

Modifcations

anddecommission

Technology

E/E/PES

Design methods

and

techniques


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The saety liecycle applies to all organizations in the saety supply chain. ABBsportolio o products and services map directly across this liecycle and in sodoing automates and streamlines the implementation o all the phases. Studies byregulatory bodies indicate that the dominant actors in the primary cause o systemailures are in specication (44.1%), changes ater commissioning (20.6%), operations

and maintenance (14.7%), installation & commissioning (5.9%), and design andimplementation (14.7%).1

ABBs Saety Liecycle Services portolio is targeted and structured to addressand mitigate these primary causes (Figure 2). These portolios include:

Saety Requirements Saety System Implementation Maintain Saety Perormance Functional Saety Management

SaetyRequirements

Portolio

Certifed Control

and Saety Systems

Solutions

Certifed Robust Field Equipment

Certifed unctional saety engineers

Certifed global saety

Execution Centres

Maintaining SaetyPerormance

Portolio

License to OperateBusiness Justifcation

Risk Reduction Strategies

Saety Requirements

Saety Case Automated SIL

Assessments

Alarm and

Trip Management

Modifcation and Upgrade Paths

Proo Testing Strategies

Impact Assessment

On-going Regulatory

Compliance

Saety Assessments

Project Execution

Project Management

Streamlined Saety Processes

Auditing Saety Management

Tools Execution

Figure 2. ABBs Saety

Services Oerings

Saety SystemsImplementation

Portolio

Competency

Training

Benchmarking Project

Management

Described in the ollowing sections, each portolio consists o validated Industrial ITproducts, consultancy services, and packaged solutions. These portolios have beendeveloped in consultation with industry, regulatory authorities, and governmentagencies in addition to meeting the requirements o industry good practicestandards. The terminology and unctionality provided is consistent with standardsand regulations.

1Out o Control - why control systems go wrong and how to prevent ailure (2nd Edition), UK Health and SaetyExecutive - Re HSG238, ISBN 0-7176-2192-8, 2004.

Functional SaetyManagement

Portolio


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Saety Requirements Portolio

Due to the complexity o the hazards in the process industry, it is required that asystematic process is used to identiy all oreseeable major accidents. Recommendedtechniques include Hazard and Operability (HAZOP) studies, reviews o pastaccidents and incidents, industry checklists, or ailure mode and eects analysis(FMEA).

For the risk assessment aspects, a Saety Report or Saety Case is requently requiredand must demonstrate that major accident hazards have been systematicallyidentied and that all necessary measures have been taken to prevent suchaccidents and limit their consequences or people and the environment.

Where protection against major accidents is dependent on the action o an activeshutdown system or human intervention, the risk assessment must consider whetherthe reliability o these measures ensures that risks remain As Low As ReasonablyPracticable (ALARP). Such a risk assessment requires the severity and likelihood othe major accident scenario to be estimated, and the resultant risk compared with

suitable risk criteria.

From the IEC 61508/61511 standard, the Saety Integrity Level (SIL) is undamental inensuring a saety related system satisactorily perorms the required saety unctionsunder all stated conditions within a dened time period. It is an assessment o therisk reduction required to give a tolerable level o risk.

Inappropriate SIL determination can aect the saety integrity o the asset protectionenvelope and may in some cases place the asset integrity under threat. In addition tothis, unnecessary spend in capital and operational budgets can be incurred.

In contrast, properly dened SIL levels allow or signicant cost improvements

to be achieved in both Greeneld and Browneld operating environments. Assetoperational saety integrity levels are maintained while the cost o ownership romongoing testing and maintenance is optimized.

ABB Saety Services oer a set o proven techniques and methods to enableidentication o hazards, assessment o risks, and determination o appropriate riskreduction strategies.

Hazard identication is important or identiying and eliminating or controllingplant hazards that could signicantly harm people, the environment or the businessitsel. Eectively identiying hazards leads to saer processes with reduced operatingcosts, compliance with the legal requirements or risk assessment, and benets romincreased eciency and protability.

ABB Saety Services include a wide range o tools and techniques or hazardidentication studies rom early conceptual stages through ongoing operation.These include:

HazardIdentifcation

IEC 61508

IEC 61511


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SIL Determination

Inherent Safety Studies. Under the guidance o ABB, development chemists andengineers work to reduce or eliminate the inherent hazard potential o a plant,and reduce the need or extra risk reduction measures such as Saety InstrumentedSystems. The methodology provides demonstration o a structured hierarchicalapproach, as required by international regulations.

Hazard Studies. The rst stage is a checklist-based study at the beginning oprocess development to ensure that all the inormation related to saety, health andthe environment is available to the project team. To avoid expensive uture delays tothe project, ABBs experienced sta also reviews what other studies are needed, andinitiates contact with the regulatory bodies that may place restrictions on the project.

The second stage is a hazard based study o the preliminary process fow diagramswhich aims to identi y and eliminate signicant hazards. I hazards cannot beeliminated, ABB will speciy what saety measures are needed and carry out riskassessments to ensure risk is reduced to an acceptable level.

The nal design stage hazard study is a HAZOP o the rm process design toidentiy signicant deviations and ensure that appropriate measures have been builtinto the design.

Saety Instrumented Systems are ound on the vast majority o process industrymanuacturing acilities to protect against hazards to personnel, the environmentand plant equipment. A key requirement is to determine the criticality o all SISson the plant to identiy systems that provide protection against major accidenthazards. It is then important to assess the required reliability o critical systems toensure that risks will be reduced to an acceptable level.

From the IEC 61508/61511 standards, the Saety Integrity Level is undamental in

ensuring a saety related system satisactorily perorms the required saety unctionsunder all stated conditions within a dened time period. SIL assessment is theprocess o determining the required reliability or a SIS, taking account o theseverity o the hazardous event and other independent layers o protection thatare contributing to the overall risk reduction.

Inappropriate SIL determination can aect the saety integrity o the asset protectionenvelope and may in some cases place the asset integrity under threat. In additionto this, an overly conservative approach can result in unnecessary capital andoperational spending. In contrast, properly dened SIL levels allow or signicantcost improvements to be achieved in both Greeneld and Browneld operatingenvironments. Asset operational saety integrity levels are maintained while the cost

o ownership rom ongoing testing and maintenance is optimized.

ABBs SIL Determination package enables asset owners to become conversant withthe relevance o SIL determination in the context o Functional Saety, and to thencondently determine the SIL level and conguration required to achieve thesetargets.


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ABBs SIL Determination package consists o:

TRAC. TRAC is a PC based sotware tool used to assist saety, project, andmaintenance engineers in determining the optimum design congurationand periodic test intervals or Saety Systems (Figure 3). It provides the engineer

with a systematic and consistent approach to calculating required SIL and trip testinterval or saety loops relating to saety, environmental, or asset loss.

Figure 3. ABBs TRAC Sotware Tool is used to Calculate SIL Requirements

and Trip Test Intervals

TRAC was developed in conjunction with BP and is used on many o their sitesworldwide. Reliability and IEC risk graph methodologies underpin quantitative and

qualitative techniques to calculate optimum values or trip testing interval set againstthe projected annualized cost. It has been designed with the remit to provide ameans or optimization o trip testing intervals, relative to cost, and in accord withUK HSE regulatory ramework.TRAC oers both Risk Graph and Layer o Protection methodologies (rom IEC61511) to assess the SIL requirements (Figure 4).

Figure 4. TRACs Risk Graph and Layer o Protection Methodologies


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TRAC then allows the saety loop to be congured rom initiator through the logicsolver to the actuator (Figure 5). The equipment ailure rates are drawn rom adatabase built into the sotware.

Figure 5. TRAC Confgured Saety Loop

TRAC provides multiple solutions or testing o inputs and outputs within bands othe required maximum and minimum allowable probability o ailure on demand.For each span o test intervals, a cost o testing is calculated rom known annualtesting costs. Results are displayed graphically and a comprehensive report is issuedwith ully traceable and archived decision processes (Figure 6).

Figure 6. Test Interval Decison Matrix

SIL Determination Training. This element o the package delivers tailored trainingin the concepts o risk assessment, hazard identication, SIL Determination andrelated aspects o IEC 61508/61511.

SIL Determination Engineering. In addition to the sotware product and training,ABB provides saety engineering expertise to equip clients with the skills andprocesses necessary or them to address their saety unction and integrity issues.The phased delivery o this engineering content includes:

Identiying suitable client risk criteria Installation & conguration o TRAC to meet clients risk criteria Coaching in initial SIL determination Coaching in the review o existing saety unction design to meet the SIL targets


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ABB saety systems oer complete TV certied SIS solutions through TV certi-ed Saety Execution Centres complying with the IEC 61508 and IEC 61511 standardsand covering, not only the logic solver, but the entire saety loop, consist ing o eld

instruments, controllers and I/O modules, and eld actuators. Highly scalable, thesesaety solutions provide the fexibility to match specic saety unctions with actualplant needs.

For System 800xA saety systems, process availability is improved while reducingrisk to overall plant operation through the systems unique common high integrityenvironment or production control, saety supervision, and production monitor-ing. This common environment eliminates the duality o system operations andtheir associated liecycle costs and leads to optimized project engineering, training,operations, maintenance, and spare parts. In addition, System 800xAs high integritycontroller, AC 800M HI, provides the ability to combine saety loops with controlapplications without sacricing saety integrity. The AC 800M HI, in combination

with a diversied co-processor, perorms diagnostics and monitoring o applicationexecution and I/O scanning. For embedded saety and control applications, all unc-tions/types in standard libraries are marked non-SIL and SIL to show their usability.Embedded saety measures prevent inadvertent degradation o saety applications(Figure 7).

Saety System Implementation Portolio

Figure 7. Certifed frewalls isolate SIL and non-SIL applications rom one

another, enabling them to reside in the same controller and run concurrently.


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Figure 8. System 800xAs Fire and Gas Library includes a Complete Range o High-level

Control Modules, Alarm Management, and Operational Templates and Strategies.

System 800xAs object oriented engineering environment with SIL compliant unctionlibraries eciently supports the entire saety system liecycle rom planning, throughdesign and library management, to commissioning and support. The engineering

environment includes saeguards against non-SIL compliant congurations. Onceidentied as a saety application, the engineering system will automatically limit userconguration choices and will prevent download i SIL requirements are not met.The engineering environment includes a comprehensive set o application speciclibraries that contain pre-congured Control Modules, Function Blocks, and graphicelements (Figure 8). ABB provides a wide range o eld proven saety applicationsincluding Fire and Gas systems, Emergency and Process Shutdown (ESD and PSD),Interlock systems, Burner Management and Boiler Protection (BMS), Critical Control,High Integrity Pressure Protection Systems (HIPPS), and Pipeline Protection Systems(PPS). The integrated libraries and tools are complimented with an extensive rangeo stand-alone services and methodologies or determining saety requirements andmaintaining the compliance or the complete liecycle.

For more inormation regarding the 800xA Saety System Oering, please reer tothe 800xA Saety Overview.


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Figure 9. TRAMS is ABBs Trip and Alarm Management System

TRAMS draws together into one system all the data, including, where appropriate,specication (reasons, etc.), design data and test methods required to manage tripsand alarms successully (Figure 10).

TRAMS schedules tests to be perormed on a monthly basis. Individual test resultsare recorded equally eectively. It has additional unctionality to deal with overdue,shutdown, and ad hoc testing (Figure 10).

TRAMS provides monthly reports on the status o testing, drawing attention to itemswhich require action. There are eight sub reports each month covering dierentaspects (Figure 10).

Operating and maintaining the asset is not an insignicant activity and spans themajority o the asset lie. The need to minimize operating expenditures (OPEX) isparamount. Over the lie o the asset, the underlying process may well be modied,saety systems upgraded and replaced, and saety cases resubmitted or regulatoryapproval. Many assets have been operating long beore the ratication o standards.However, the changing regulatory regime coupled with the need to drive down thecost o ownership determines the requirement or a number o asset saety healthchecks and benchmarking regimes. The Maintaining Saety Perormance portolioaccomplishes this and provides validated sotware to enable management o tripand alarm systems.

TRAMS is a ully validated, proessionally developed, interlock/trip and alarmmanagement, scheduling and reporting system (Figure 9). It is a PC based sotwarepackage developed by ABB or the management, scheduling, reporting and datastorage o technical specications, or plant trip and alarm saety or product critical

systems.

Maintaining Saety Perormance Portolio

TRAMS


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Figure 10. Examples o TRAM Register-Routine, Monthly Schedules, and Monthly Reports

TRAMS produces, on demand, reports on history o testing or selected time period/plant/area or specic loop etc.

Key eatures o the system include:

Draws together all relevant data in a customised, user riendly database

Demonstrates the selection o appropriate saety integrity levels (SIL)

Aids the reduction o maintenance costs by proo testing at optimum intervals

Provides consistent proo testing using written test methods and specied setpoint tolerances

Provides exceptionally ast and ecient reporting o proo test results

Produces accurate reports on the status and results o proo testing Processes trip and alarm reporting data or easy review o saety system

perormance

Identies saety unction items, which have poor availability andrequire improvement

Windows based sotware with easy to understand menu and help displays

A cost eective alternative to larger mainrame maintenance packages


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7

6

5

4

3

Historically, the way in which saety instrumented systems have been applied hasvaried across industry. A recent collaborative research project, led by ABB, hashelped to dene a set o indicators o what it is reasonable and practical to expecto installed systems. The areas o particular interest were the diculty ocomparison o older systems against the standard, and practical steps that can

be taken towards compliance.Benchmarking with Installed Sytems Review (ISR) allows owners and operatorso older systems to know exactly where they stand in relation to current acceptedgood practice, and provides a clear direction or actions required to becomecompliant. ABBs ISR method compares the system against accepted norms, toallow a ocussed approach to improvements, and highlights which areas or changeshould be addressed as priorities (Figure 11). The ISR is a structured approach thatmakes use o existing site unctional saety management systems, and previous riskassessments.

Figure 11. Sample ISR Methodology

Become amiliar with layout, process, saety

management systems, inrastructure, etc.

Means o allocating unctionality and integrity

requirements to IPS.

List the main hazards o the plant/process.

Choose a unit o plant to investigate, based on

risks identifed rom previous steps.

Ascertain Basis o Saety or the unit.

Is the necessary risk reduction achieved without

the IPS (see 6.16.2)?

Select a protection loop. Is there an overall

allocation o saety requirements (unction and

integrity) available, which is intended to support

the specifcation o the IPS?

Yes

Return to 4 or stop.

Review. I allocation is not signifcant, pick

another loop. I no more loops, return to 4.

I allocation is signifcant, and clear to to 9

(to pursue realization).

@@

1 Discuss the site in general.

2

Yes

No

Installed SystemsReview


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A short site review program is planned in advance. In this way, evidence can becollated and site personnel time can be optimized. The ISR approach starts withan assessment o SIL requirements, ollowed by comparison o arrangements withindustry consensus practical steps. This is done to yield a report speciying anynecessary improvements.

Brie descriptions o what would be considered practicable or each o these clauseshas been identied and graded according to SIL requirements.


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Operators o hazardous plant need to take steps to ensure that they have in placesuitable proo testing regimes to ensure that the required SIL o each saety instru-mented unction is maintained during operation and maintenance and to operateand maintain the SIS so that the designed unctional saety is maintained. ProoTesting regimes orm an integral part o the asset owners (unctional) saety

management system.

ABBs experts have worked with industry and regulatory bodies through research,analysis o industry good practice and relevance o standards into the practiceso proo testing, to develop a methodology and comprehensive set o Guidingprinciples or the proo testing o SISs in the process industry. These guidingprinciples thereore provide independent guidance on proo testing issues whichare o interest and concern to industry.

This eature o ABBs Saety Services supports users with a methodology designedto provide them with a benchmark or their proo-testing regime. This benchmarkproles attributes including:

Management Design Testing Records Competency

These key attributes relate to a number o principles o proo testing (PPT) andin-turn each PPT has a number o infuencing actors.

These principles are:

Proo testing practices Content o proo testing procedures Format o proo testing procedures Planning and scheduling Proo test records Competence Awareness o hazard and risk Management o change

The method enables cross comparison o proo test regimes to enable users toidentiy areas o weakness, implement improvement programs, and measure anddemonstrate improvements in proo testing regimes.

Strengths and weaknesses in proo testing regimes can be analysed andimprovement programs initiated.Todays high hazard industries aces many challenges and issues, these include:

Achieving continuous improvement on aging assets Changes in design intent due to modications Need to demonstrate that systems are t or purpose Backdrop o rising standards and stakeholder expectation

Proo TestBenchmarking

IEC 61508

IEC 61511


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Process Hazard Review (PHR) is a team based hazard identication and riskassessment methodology used to achieve continuous saety improvement orongoing process operations (Figure 12). It has a good track record in identiying keyissues and it is much quicker than comparable techniques such as HAZOP, therebyminimizing both the costs or review and the time required or busy operations sta.

It has been widely used in the Process Industry and is accepted by the regulatoryauthorities.

PHR is oten used on existing plants where hazard studies have not been carried outor where they have become out o date. It is an eective method or identiying themain hazardous events and the critical risk reduction measures, including SISs. PHRprovides the opportunity to identiy and assess shortcomings in the risk reductionmeasures, and to make recommendations or improvements.

ABBs well proven, structured and risk based approach provides a detailed riskassessment and prioritized improvement plan that is deendable with seniormanagement and the regulatory authorities. Sta attending the review enjoy ongoingbenets as they gain an improved understanding o their operations process relatedhazards.

PHR can help maintain a license to operate and prevent major accidents, which canharm people, the environment, and the business. With a thorough understanding o

the risks and a knowledge that all reasonably practicable steps have been taken, italso provides peace o mind.

Figure 12. PHR Guidewords

Long Term WeakeningSeal FailureEquipment Failure

PunctureNatural Event

Vessel OverfllMaloperation o Opening

Internal ExplosionUncontrolled ReactionPhysical OverpressureTemperature Excursion

OutsideDesign Limits

Loss viaProcessOpening

Failure oMechanical

Integrity

ExternalEects

LOSS OFCONTAINMENT

Process HazardsReview


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Functional Saety Management Portolio

Functional SaetyManagement sys-tems review andimplementation

For those organizations that operate globally, the demands o the internationalmarket create challenges to ormally demonstrate their saety managementcapabilities due to diering regulatory regimes, mutual recognition, and prot versus

saety balance. Saety standards, notably IEC 61508 and IEC 61511, draw attention toa relatively new concept, the management o unctional saety and the requirementsto establish appropriate unctional saety management systems. These systemsrequently underpin an organizations saety management system.

However, or organizations that are developing unctional saety managementsystems, this is not an overnight activity. Has the organization dened itsunctional saety strategy, what are drivers behind the development o the system;regulatory pressure, to demonstrate due diligence, reduce the eort and costinvolved in regulatory review and inspections, lower insurance premiums, gainmarket advantage, or reduce external audits and assessments? How does thebenchmark standards (IEC61508 & IEC 61511) help in understanding the conceptsand terminology, what are the boundaries o the system, is third party certication

required, are there pitalls to implementation?

The Functional Saety Management Review is designed to assist any organizationinvolved in the saety liecycle to benchmark their unctional saety managementsystem and competency scheme against the requirements o IEC 61508/61511 (Figure 13).

By using checklists aligned to the relevant phases and clauses o the standards,evidence gathering and interviews, a gap analysis report is compiled and used asa basis or development o an improvement program. ABB work with the client inimplementing a road map to compliance. This includes the provision o validatedgeneric compliant procedures.

The benets o such an approach include:

Actively promote their unctional saety management systems capabilityas compliant with good practice international saety standards

Reduce the need (and subsequent cost) o assessment by second parties(customers)

Streamline contractual negotiations with clients

Limit exposure to contract and corporate liability

Demonstrate due diligence

Meet both local and international regulations

Remove barriers to route to market


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Figure 13. Functional SaetyManagement - Roadmap to Compliance

Principleso IEC 61508/61511

Client Strategy

Program Management

Functional Saety

Management Appreciation

Coarse

Gap Analysis

Functional Saety

Management Implementation

Pre-Assessment

Review

Compliance(Certifcation as Required)

Continuous assessment

improvement & maintenance

programme


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During saety project execution it is necessary to provide independent verication osaety project deliverables such as design documentation. This verication ensures arigorous approach to saety system design and implementation reducing the likeli-

hood o systematic errors. This verication activity supports a claim o systematiccapability.

ABB oers a saety project verication service covering key saety liecycle deliv-erables using a well dened and proven verication process based on the require-ments o IEC 61508 and IEC 61511. ABB personnel work within the clients designand implementation team. The role may extend to other organisations working onbehal o the client and responsible or specic project deliverables. This togetherwith a high level o individual competency ensures that any issues relating to unc-tional saety are identied early in the saety liecycle, leading to a reduction in po-tential rework and providing higher condence to the client and other third parties.

Independent saety project verifcation service

Functional Saety Assessment is a relatively new concept in unctional saety. It is aninvestigation based on evidence to judge the unctional saety achieved by one ormore E/E/PES saety-related systems. It is now being demanded by many clients andthird party organisations (regulatory authorities and certication bodies) as a keydeliverable in the demonstration o the achievement o unctional saety.

ABB oers a unctional saety assessment service which is truly independent romthe clients management and technical organisation and activities and meeting theindependence requirements stated within IEC 61508 Part 1 clause 8.2.14. The ABBunctional saety assessment methodology uses checklists developed directly romIEC 61508. This assessment process is tailored to the specic phases o the saetyliecycle being implemented by the client. The results o the assessment process areclearly provided in a report that is easily understood by dierent project engineeringdisciplines such as C&I engineers, Quality engineers and project management soacilitating an eective corrective action programme.

Client and other third parties are increasingly demanding that unctional saetyassessments are implemented by independent and competent organisations suchas ABB.

Independent Functional Saety Assessment service


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Successul demonstration that the target SIL or a saety instrumented unction hasbeen achieved is reliant on many aspects o the overall saety liecycle, such asHazard and Risk Assessment, SIL Determination, Saety Requirements Allocation, andRealisation phases 1 to 9 o the IEC 61508 saety liecycle. The evidence required

in order to demonstrate that a saety instrumented system unction meets its targetSIL (i.e. the SIL Achievement exercise) is ar more than a quantitative exercise, basedsolely on target ailure measure. Architectural constraints and Systematic capabilitymust also be taken into account.

SIL Achievement is a demonstration that or each Saety Instrumented Function, thetarget SIL, as derived rom SIL Determination, has been met in accordance with therequirements o IEC61508.

As part o our saety systems integration and engineering services we perorm SILAchievement using proven methodologies and provide comprehensive reports.Only when a saety instrumented unction meets the criteria set by IEC 61508 in

terms o architectural constraint, target ailure measure and systematic capability,can the target SIL be said to be achieved.

SIL Achievement

Figure 14. SIL Achievement Collage


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3BUS092094 en A Copyright 2008 ABB. All rights reserved. Specifcations subject to change without notice. Pictures, schematics and other graphics contained herein are published

or illustration purposes only and do not represent product confgurations or unctionality User documentation accompanying the product is the exclusive source or

ABB

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Process Automation DivisionSingaporePhone: +65 6776 5711

Fax: +65 6778 0222www.abb.com/controlsystemse-mail: [email protected]

ABB

Process Automation DivisionWicklie, Ohio, USAPhone: +1 440 585 8500Fax: + 1 440 585 8756www.abb.com/controlsystemse-mail: [email protected]

ABB

Process Automation DivisionMannheim, GermanyPhone: +49 (0) 1805 26 67 76

Fax: +49 (0) 1805 77 63 29www.abb.de/controlsystemse-mail: [email protected]

For the latest inormation on ABB visit us on the World Wide Web at http://www.abb.com/control systems

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ABB Automation LtdHoward Road, Eaton Socon, St NeotsHuntingdon, CambridgeshirePE19 3EUPhone: +44 (0) 1480 475321Fax: +44 (0) 1480 217948

ABB

Engineering ServicesBelasis Hall Technology ParkP.O. Box 99, Billingham, Stockton-on-TeesTS23 4YSPhone: +44 (0) 1642 372000Fax: +44 (0) 1642 372111e-mail: [email protected]

www.rcb2.se,

8284.

Documents

3BUS092094 a en System 800xA Safety Lifecycle Services Overview