This part of ISO 15531 provides a data model for flow management, and a related set of building blocks, from which are specified standardized data models and representations for the planning, scheduling, controlling and monitoring of material and informational flows. This is in contrast with ISO 15531-42, which provides a time model only. Consequently this part of ISO 15531 provides a representation of data related to flow control and management in manufacturing, through the development of a conceptual flow model. The following are within the scope of this part of ISO 15531: ? representation of data related to the management and control of manufacturing flows. NOTE – This information is usually provided within the main plant, and exchanged among the different machine tools, or production cells. The following are outside the scope of this part of ISO 15531: ? modelling of information related to the external exchanges; ? modelling of information related to the resource usage made during the manufacturing processes; ? modelling of the information related to the representation of the time.