The role class “ProductionLine” should be used for defining the role based equipment hierarchy defined in IEC 62264-1:2013, 5.3.7, for discrete manufacturing at the work cell level: “Production lines and work cells are the lowest level of equipment. Work cells are usually only identified when there is flexibility in the routing of work within a production line. Production lines and work cells may be composed of lower-level elements, but definitions of these are outside the scope of this document. The major processing activity often identifies the production line. Examples of production line identifications are ‘Bottling Line #1’, ‘Capping Line #15’, and ‘Water Pump Assembly Line #4’. Production line and work cells have well-defined manufacturing capabilities and throughput capacities.”