exida - Functional Safety Services, IACS Cybersecurity, Alarm Management, IEC 61508 Certification

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Richter Chemie-Technik - MV / MVP / MVM / MVMP

IEC 61508 in the Safety Automation Equipment List


Richter Chemie-Technik - KN / KNR / KNA / KK / KA / KH / BVA

IEC 61508 in the Safety Automation Equipment List


Profire Energy, Inc. - PF2200-DB Burner Control System

IEC 61508 in the Safety Automation Equipment List


Blog Entry: Back to Basics: Failure Rates - λDD

The Greek symbol λDD is the detectable dangerous failure rate in functional safety expressed in the unit of measurement of FITs which can be determined through FMEDAs . ( FITs (λ) are failures per billion hours, expressed by 10 -9 hours). λDD is the number of dangerous detected failures per…


Recorded Webinars: What is Prior Use Justification?

The IEC61511 standard requires that designers of Safety Instrumented Systems (SIS) need to justify the selection of equipment to be used in Safety Instrumented Functions (SIFs). As such, the standard defines only two methods that are acceptable: IEC61508 certified devices or Prior Use Justification. Devices that are not certified to IEC61508 will require suitable justification for use in SIFs. The objective of Prior Use Justification is to gather evidence that the dangerous systematic faults have been reduced to a sufficiently low level, compared to the required safety integrity. This is in addition to the separate requirement to satisfy the random failure rate/probability criteria (i.e. PFDavg/PFH).

The purpose of this webinar is to shed some further light into the Prior Use Justification requirement for SIF equipment and what that means to the end user. 

What you will learn?

  • What is Prior Use Justification 
  • What that means to the end user
  • How to justify use of the equipment
  • What is the purpose of Prior Use

Who should attend?

  • SIS designers and Engineering contractors
  • Operations and maintenance personnel
  • Plant Managers and Supervisors


Book: Cyber Book Package

exida’s “Cyber Book Package” is perfect for those studying for the CACE / CACS exam bundled together at a discounted price. The “Cyber Book Package” consists of: Certified Automation Cybersecurity Expert/Specialist (CACE / CACS) Study Guide Implementing IEC 62443 - A Pragmatic Approach to Cybersecurity


News Item: Component Reliability Database - Major Release Completed

exida's Component Reliability Database (CRD) has been updated with several new electronic and mechanical components. John C. Grebe, Chief Architect of the FMEDAx TM tool, explains “The semiconductor industry is creating new electronic components at an amazing pace. Any component database used for FMEDA must be updated to be value.…


News Item: Safe Operating Limits White Paper Published in AICHE Process Safety Progress

The exida white paper Do not let your safe operating limits leave you S‐O‐L (out of luck) has been rewritten and repurposed for the AICHE publication Process Safety Progress . This article was prepared for presentation at American Institute of Chemical Engineers 2019 Spring Meeting, 15th Global Congress on Process…


Blog Entry: Risk Management in the News

I just read a great article in the May issue of IEEE Spectrum magazine called “ Managing Risk and Responsibility During a Crisis .” The author Robert N. Charette says “If the American people desire the federal government to be their risk manager of first resort, then an open and…


Recorded Webinars: The Rise of Personnel Competency

As personnel competency grows, so does the competition. The question becomes, how do you keep yourself in the playing field that is right for you? Are you an expert? Are you someone that just wants to learn? Are you are in the middle? Choosing the personnel certification program that best suits your needs is very important and understanding the different programs is equally important. This webinar will briefly share with you many common questions that are asked each and every week about personnel certification. It will also discuss the different certification and certificate programs out there, share insight on those differences, and help paint a picture on which one(s) would benefit you.


Blog Entry: What is Prior Use Justification?

When it comes to IEC61511 and the selection of equipment for use within Safety Instrumented Systems (SIS) and Safety Instrumented Functions (SIF), there are only two methods that can be used to justify selection: I EC61508 Certified devices for the required SIL or Prior Use Justification. Just because the user…


Blog Entry: Know Your Human Error (Part I)

Increases in levels of automation and system complexity impact human error. Medical errors in hospitals and clinics result in approximately 100,000 people dying each year and cost the healthcare industry between $4B – $20B each year. In the petrochemical industries, operational error can cost upwards of $80M per incident. “Operator…


Training Course: Functional Safety Management Planning for IEC 61511

Safety planning is a specific requirement of IEC 61511 yet many organizations lack specific documentation on how functional safety is managed. This course reviews the requirements of the IEC 61511 Lifecycle and offers guidance for development of a written Functional Safety Management (FSM) Plan. It provides insights on how to…


Recorded Webinars: How Final Element Design and Selection Relates to Overall SIF Performance and Cost

Final elements play a key role in achieving a safe design, initial capital investment, and total operation cost. Understanding how final elements are designed and how they can fail enables users to make informed tradeoffs between upfront cost and lifetime costs. This webinar will review key information that should be collected and reviewed whether you are working with a new SIF design or managing installed equipment. 

Attendees of the webinar will:

  • Develop an understanding of key drivers to final element performance in safety systems
  • Learn how final element design and documentation can drive maintenance costs
  • Learn about new solutions such as exida’s eRAVA certification


Cisco - Catalyst IE3100 Rugged Series / Stratix 5200

IEC 62443, ISASecure in the Security Automation Equipment List


Blog Entry: Back to Basics: Failure Rates - λDU

The Greek symbol λDU is the undetectable dangerous failure rate in functional safety expressed in the unit of measurement of FITs which can be determined through FMEDAs . ( FITs (λ) are failures per billion hours, expressed by 10-9 hours). λDU is the number of dangerous undetected failures per unit…


Emerson Automation Solutions Final Control US LP - JBS Actuated Pressure Relief Valve

IEC 61508 in the Safety Automation Equipment List


Dr. Octopus Intelligent Technology - Functional Safety Management process

ISO 26262 in the Safety Automation Equipment List


GE Gas Power - 109FB Gas Turbine & A17 Steam Turbine

IEC 61511 Type Approval in the Safety Automation Equipment List


Blog Entry: Grasping the Power of the (Stuxnet) Virus (or What I did during the COVID-19 Pandemic)

The travel and group meeting restrictions from COVID-19 have allowed me to catch up on some reading about viruses; not the type that get transmitted to humans. This article is about the Stuxnet virus and what I learned from the book “Countdown to Zero Day: Stuxnet and the Launch of…


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