What is systematic capability vs SIL ?

Systematic capability is a term used to describe the ability of a system or process to minimize or eliminate errors. failures. and other negative outcomes. It is a systematic approach to improving the overall performance and reliability of a system. and it involves the implementation of processes and procedures to reduce the impact of systematic errors and failures.

On the other hand. Safety Integrity Level (SIL) is a measure of the reliability of safety functions implemented in a system. It quantifies the probability of a safety system failing to perform its intended function and the associated risks. SIL levels range from SIL 1 (lowest reliability) to SIL 4 (highest reliability).

The relationship between systematic capability and SIL is closely intertwined. While systematic capability focuses on ensuring that proper processes and procedures are in place to reduce systematic errors and failures. SIL aims to evaluate the reliability of safety functions within those systems.

A high systematic capability helps in achieving and maintaining a desired SIL level by providing the necessary framework for effective system design. development. and control. It enables the development of a systematic safety approach that aligns with the overall safety requirements and objectives of the system or organization.

In practice. systematic capability can be demonstrated through various means. such as following recognized international standards (e.g. ISO 26262 for automotive systems). establishing robust quality management systems. conducting thorough risk assessments. and implementing suitable measures to control potential failures.

SIL requirements and objectives can then be aligned with the overall systematic capability of an organization or a system. This integration of systematic capability and SIL is critical for ensuring the safety and reliability of complex systems.

In conclusion. systematic capability and SIL are two important concepts in the field of functional safety. While they are distinct concepts. they are closely intertwined and work together to ensure the safety and reliability of complex systems. A high level of systematic capability is necessary for the development of a robust safety approach that meets the overall safety requirements and objectives of a system or organization.