A methodology for the assignment of safety integrity levels (SILs) to safety-related control functions implemented by safety-related electrical, electronic and programmable electronic control systems of machines /
Charlwood, Mark
Turner, Shane
Worsell, Nicola
Great Britain.Health and Safety Executive.
Health and Safety Laboratory (Great Britain)
Innovation Electronics (UK) Ltd.
Sudbury : HSE Books,
2004.
"Prepared by Innovation Electronics (UK) Ltd and the Health & Safety Laboratory (HSL) for the Health and Safety Executive"
Includes bibliographical references.