THE SAFETY INTEGRITY LEVELS OF IEC 61508 AND A REVISED PROPOSAL
Michael A. Hennell, Jim Woodcock, Martin R. Woodward · 2007
sets, fault spanning sets. The paper proposes a new scheme for safety integrity levels (SILs) based on reasoned principles. The scheme provides a mechanism for selecting appropriate verification and validation techniques for a given SIL and, in particular, suggests a replacement for the existing technique selection tables of the IEC 61508 standard. 1