Like the automotive, medical device and process industries, the railway sector based their functional standard on the industry agnostic functional safety standard IEC 615085. The resulting EN 5012X series has become the dominant railway functional safety standard, and its requirements and processes are becoming increasingly familiar across the world. The international standards IEC 622786, IEC 627797, and IEC 622808 very largely mirror EN 50126, EN 50128 and EN 50129 respectively and can be considered to be identical in the context of this document.