Introduction of functional safety into the field of maintenance and preventive maintenance

Ten years have passed since the functional safety standard was issued, and it has extended to a lot of fields including the safety system of the plant. Recently, operation based on a quantitative risk analysis has been required as part of the safety lifecycle also in the field of maintenance and the preventive maintenance. In this paper, it meets the functional safety technology of IEC 61508, and relations of the technology and the theory to the maintenance field are analyzed. At the end introduces how to tackle maintenance in future.