The role class “ProcessCell” should be used for sub units/sub production steps of units/production lines, station, processes single component, cycle, location in which the production step takes place. It is used for hierarchization. The definition of a “ProcessCell” is given in IEC 62264-1:2013, 5.3.8: “Process cells and units are the lowest level of equipment for batch manufacturing processes. Units are usually only identified if there is flexibility in the routing of product within a process cell. The definitions for process cells and units are contained in the IEC 61512-1 standard. The major processing capability or family of products produced often identifies the process cell. Examples of process cell identifications are ‘Mixing Line #5’ and ‘Detergent Line 13’. Process cells and units have well-defined manufacturing capabilities and batch capacities.”