Health, Safety and Environment

Safe Failure Fraction (SFF)

Safe failure fraction is an arbitrary metric used within IEC 61508 (and other guidance) in order to set architectural rules (or constraints). This is a metric based on diagnostic coverage.

Understanding the Risk Receptors

Understanding Risk Receptors: Safeguarding People, Environment, and Assets In process safety, the concept of a risk receptor plays a pivotal role in identifying and mitigating potential hazards. A risk receptor

Mission Time in Functional Safety and Reliability Engineering

Understanding Mission Time in Reliability Engineering: A Key to System Reliability In reliability engineering, mission time refers to the period during which a system, component, or device is expected to

Demand and Continuous Demand Modes of Operation of SIF

Modes of Operation of a SIF The demand mode of a Safety Instrumented Function (SIF) refers to the operational mode in which the SIF is activated only when a specific

SIS Application Program Safety Lifecycle

Step 1: Application Program Safety Requirements Objective: To specify application program safety requirements for each SIS necessary to implement the required SIF. To specify the requirements for the application program

SIS Safety Lifecycle Overview as per IEC 61511

The Safety Instrumented System Safety Lifecycle defines the necessary activities involved in the implementation of SIF occurring during a period of time that starts at the concept phase of a

Safety Requirements Specification (SRS) Defined in IEC-615611

The development of the SIS SRS is one of the most important activities of the whole SIS safety life cycle. It is through this specification that the user is able

SIL Assignment Using Risk Matrix

How to Use a Risk Matrix to Determine SIL? Safety Integrity Levels (SIL) are critical for ensuring that industrial processes meet acceptable safety standards. A risk matrix is one of

A Comprehensive Guide for Fault Tree Analysis (FTA)

Fault Tree Analysis (FTA) is a systematic and graphical method used to identify potential causes of system failures. It is widely utilized in industries such as aerospace, nuclear power, and