ANSI/ISA-95.00.03-2005, Enterprise-Control System Integration, Part 3: Models of Manufacturing Operations Management focuses on the functions and activities at level 3 (Production / MES layer).
The models and attributes from part 4 are the basis for the design and the implementation of interface standards and make sure of a flexible lapse of the cooperation and information-exchange between the different MES activities.
This technical specification defines operation between office and production automations-systems, which can be used together with the object models out part 1 & 2.
The operations connect and organise the production objects and activities that are defined through earlier parts of the standard.
Such operations take place on all levels within a business, but the focus of this technical specification lies on the interface between enterprise- and control systems.