It is intended to complement and supplement similar project breakdown structure processes, requirements and recommendations contained within ISO 14300-1, which serves as a higher tier International Standard for ISO 27026:2011 and for such other space systems and operations International Standards that require formal project breakdown structures.
ISO 27026:2011 specifies the various types of project breakdown structures and gives processes, requirements and guidance concerning the composition of these breakdown structures.
ISO 27026:2011 is applicable to project breakdown structures for a project, including at the top level of a programme, i.e. level 0. It is intended to be used either by an independent developer as a partial basis for programme processes or as a basis for an agreement between a supplier and a customer.