"Sira Test & Certification has been actively involved in applying the international functional safety standard IEC 61508 since it was first published in 1998. Soon after the publication of the standard a U.K. government-funded initiative introduced the Conformity Assessment of Safety-related Systems (CASS) scheme, intended to provide an industry-wide approach and interpretation to IEC 61508 assessment and certification." - Mike Boudreaux from Bookmarklet