Well I figured I would start here and see what happens. Does anyone out there know anything about EN 550/554, they are Validation and Routine Control of Sterilization by Moist Heat and Ethylene Oxide Sterilization. I have asked our Registrar for a checklist of what they audit to and they do not have one. Does anyone out here have one or know where I could find one. I am in the process of developing one and would like others to look at for ideas.