ISO 11863:2011 is applicable to any size or scope of assets of buildings and building-related facilities, e.g. to a portfolio of assets at a single site or multiple sites, to assets of a single small building, and to any constituent system, sub-system, component or element thereof. It is applicable to a range of roles, from owners and managers to occupants, tenants, or other users or stakeholders. It is applicable to any asset type within the field of buildings and civil engineering works, including certain public works, equipment and materiel. It is particularly useful for entities having control or occupancy of a portfolio of such assets.