Updated April 2026 - A Functional Safety Assessment (FSA) is defined by the IEC 61511 standard as an “investigation, based on evidence, to judge the functional safety achieved by one or more SIS and/or other protection layers.” The ultimate goal of an FSA is to make the team confident that their instrumented safety system will reliably achieve the risk reduction needed. While many organizations understand the importance of FSAs, not everyone realizes the significant advanta
