The Preliminary Hazard Analysis

The Preliminary Hazard Analysis (PHA) consists in identifying, at the system level, which redundant events can lead to dangerous situations for people. These events are then classified by assigning a safety level. This analysis is performed using a set of known hazards (or identified in an analysis of operational risks, for example) in different life […]

Risk control and dependability

As part of a PEE(Programable / Electrical / Electronics), the analysis of dependability of a system must fit into a risk management overall. Indeed, the analysis of dependability of a PEE system can allocate a level of confidence in the safety, reliability, availability and maintainability of the functions for which it was designed. These PEE […]

The Electrical/Electronic System Reliability

Reliability definition The most current reliability definition is, the (probability of) capability of an entity to perform a required function, in a defined environment and during a defined period of time. The goal objective The goal objective in the design of a system, is that it will be able to perform the functions for which […]

Does the SIL systems exist?

The term “system SIL” is a term used frequently, but very often leads to confusion. In fact, if one takes the meaning of the abbreviation SIL, we get Safety Integrity Level. The safety integrity is the probability for a safety related system to execute, in a satisfactory manner, the safety related functions required in all […]

The IEC Standard and its derivatives

The IEC 61508 standard is a generic standard, created in European version by CENELEC in 2002 as EN 61508, and todayis used as reference by all major industrial sectors. Since its creation, several derivatives of this standard (called child standards) were created. Each time, these child standards have been established with the objective of making […]