In functional safety, safety integrity level (SIL) is defined as the relative level of risk-reduction provided by a safety instrumented function (SIF), i.e. the measurement of the performance required of the SIF. [1]

Safety Integrity Level, or as more usually referred to "SIL" or "SIL level", is a unit of measurement for quantifying risk reduction. SIL 1 - represents the integrity required to avoid relatively minor incidents and is likely to be satisfied by a certain degree of fault tolerant design using guidelines that follow good practice.

2023年9月6日 · Safety Integrity Level (SIL) is a measure used in functional safety standards to represent the relative level of risk-reduction provided by a safety instrumented function (SIF).

As defined in the IEC standards, there are four SIL Levels (1-4). A higher SIL Level means a greater process hazard and a higher level of protection required from the SIS. To generalize how SIL Level is determined, see Figure 1. SIL Level is a …

There are a number of methods to define SIL, ranging from qualitative (Risk-Matrix), semi-qualitative (calibrated Risk Graph), semi-quantitative (LOPA), to quantitative (QRA). These methods are described in IEC 61511-3, respectively VDI/VDE 2180-1.

Safety integrity level 4 (SIL4) is the highest level of safety integrity and safety integrity level 1 (SIL1) is the lowest level. Safety integrity is considered to be composed of the following two elements: Hardware safety integrity; that part of safety integrity relating to random hardware failures in a dangerous mode of failure.

Nucleotide exchange factor SIL1 is a protein that in humans is encoded by the SIL1 gene. [5][6][7][8] This gene encodes a resident endoplasmic reticulum (ER), N-linked glycoprotein with an N-terminal ER targeting sequence, 2 putative N-glycosylation sites, and a C-terminal ER retention signal.