IEC 62264-1:2013 describes the manufacturing operations management domain (Level 3) and its activities, and the interface content and associated transactions within Level 3 and between Level 3 and Level 4. This description enables integration between the manufacturing operations and control domain (Levels 3, 2, 1) and the enterprise domain (Level 4). Its goals are to increase uniformity and consistency of interface terminology and reduce the risk, cost, and errors associated with implementing these interfaces. IEC 62264-1 can be used to reduce the effort associated with implementing new product offerings. This second edition cancels and replaces the first edition published in 2003. It constitutes a technical revision and includes the following significant technical changes with respect to the previous edition: - the functional hierarchy in 5.2 was extended using the definitions from IEC 62264-3; - the equipment hierarchy in 5.3 was extended using the definitions from IEC 62264-3; - a physical asset equipment model was added in 5.3; - the generic model of manufacturing operations management categories in Clause 7 was added using information from IEC 62264-3; - the formal UML models that were in Clause 7 were moved to IEC 62264-2 and the remaining data definitions are now in Clause 8; - the capacity and capability model in Clause 8 was extended; - new Annexes A and B were moved from IEC 62264-3; - Subclause 5.5 on the decision hierarchy was removed and a reference added to ISO 15704; - Annex C, D, E were moved to a Technical Report; - Annex F was removed.