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News Item: exSILentia Training Course Announced
exida has announced open enrollment for an exSILentia® Safety Lifecycle Engineering Tool Training training class to be held in Frankfurt, Germany between September 21, 2010 - September 23, 2010. The exSILentia® Safety Lifecycle Engineering Tool is a powerful aid for any engineer involved in safety lifecycle tasks such as PHA,…
Flowserve - Logix 3200MD
IEC 61508 in the Safety Automation Equipment List
Flowserve - Spring Cylinder Linear Actuator
IEC 61508 in the Safety Automation Equipment List
Flowserve - Mark One 3-Way
IEC 61508 in the Safety Automation Equipment List
Flowserve - Survivor
IEC 61508 in the Safety Automation Equipment List
Flowserve - Mark Six
IEC 61508 in the Safety Automation Equipment List
Flowserve - Mark One
IEC 61508, ISO 13849 in the Safety Automation Equipment List
News Item: exida responds to malware targeting Siemens WinCC/PCS 7 systems
If you are involved in industrial automation you’ve probably heard of the recent discovery of a virus that specifically targets Siemens WinCC and PCS 7 applications using a default password. The virus exploits a previously unknown Windows vulnerability that allows the virus to install and spread via USB memory sticks.…
White Paper: What Does Proven-In-Use Imply?
The functional safety standards, IEC 61508, IEC 61511, and ANSI/ISA 84.01 each specify the Safety Integrity Level performance parameter for Safety Instrumented Functions. For a Safety Instrumented Function to meet a specific Safety Integrity Level the sum of the average Probability of Failure on Demand (PFDavg) of all components, part…
White Paper: Statistical Signature Analysis
In order to assign a SIL to equipment in low demand applications, we must be able to compute PFDavg. To compute PFDavg, we must first have a model for λD(t), the failure rate of the equipment in the dangerous failure mode. A dangerous failure occurs when equipment designed for prevention…
White Paper: Real Time Operating Systems for IEC 61508
In today’s world many potentially dangerous pieces of equipment are controlled by embedded software. This equipment includes cars, trains, airplanes, oil refineries, chemical processing plants, nuclear power plants and medical devices. As embedded software becomes more pervasive so too do the risks associated with it. As a result, the issue…
White Paper: Saved by the Bell: Using Alarm Management to make Your Plant Safer
Recent industrial accidents at Texas City, Buncefield (UK) and Institute, WV have highlighted the connection between poor alarm management and process safety incidents. At Texas City key level alarms failed to notify the operator of the unsafe and abnormal conditions that existed within the tower and blowdown drum. The resulting…
White Paper: Get a Life(cycle)! Connecting Alarm Management and Safety Instrumented Systems
Alarms and operator response are one of the first layers of defense in preventing a plant upset from escalating into an abnormal situation. The new ISA 18.2 standard on alarm management recommends following a lifecycle approach similar to the existing ISA84/IEC 61511 standard on functional safety. This paper will highlight…
White Paper: Functional Safety in the Life Science Industries
There are many benefits to a company when they have access to good field failure data. Most of the benefits are categorized as saving money. At the same time, most of the expenditure to get good failure data is already being spent. Given an incremental cost of improving data collection…
White Paper: Field Failure Rates - The Good, The Bad, The Ugly
There are many benefits to a company when they have access to good field failure data. Most of the benefits are categorized as saving money. At the same time, most of the expenditure to get good failure data is already being spent. Given an incremental cost of improving data collection…
White Paper: Field Failure Rates - The Good, The Bad, The Ugly
There are many benefits to a company when they have access to good field failure data. Most of the benefits are categorized as saving money. At the same time, most of the expenditure to get good failure data is already being spent. Given an incremental cost of improving data collection…
White Paper: Development of a Mechanical Component Failure Database
In this paper, we present a methodology to derive component failure rate and failure mode data for mechanical components used in automation systems based on warranty and field failure data as well as expert opinion. We describe a process for incorporating new component information into the database as it becomes…
White Paper: Using Simulation to Characterize Common Cause
Fault tolerant systems have been designed for safety critical applications including the protection of potentially dangerous industrial processes. These systems are typically evaluated and certified to functional safety standards with IEC 61508 [1] by agencies like exida Certification or one of the TUV companies. Many factors are taken into account…
White Paper: Alarm Management and ISA-18 - a Journey, Not a Destination
Poor alarm management is one of the leading causes of unplanned downtime, contributing to over $20B in lost production every year, and of major industrial incidents such as the one in Texas City. Developing good alarm management practices is not a discrete activity, but more of a continuous process (i.e.,…
White Paper: Accurate Modeling of Shared Components in High Reliability Applications
Accurate Modeling of Shared Components in High Reliability Applications
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