SIS/SIF Decommissioning

While IEC 61511 devotes a separate clause to SIS Decommissioning, which highlights particular requirements for this activity, following the approach defined for “Modifications” will normally satisfy all those requirements – and has the main benefit that this avoids the need to set up a different set of procedures just for Decommissioning.

Note - that “Decommissioning” includes removal of a single SIF from a SIS, it isn’t restricted to Decommissioning of the entire process, though that too would be in scope.

What =Method can do for you

At =Method, we’d treat SIS or SIF Decommissioning as if it were a modification.