5 Parts of ISA95

The ISA95 standard is made up of five individual parts. Each part offers specific definitions to support different aspects of interfacing control systems with enterprise systems.

Parts One and Two have recently been reviewed. Parts Three through Five have been through many drafts and are now being adopted. “Parts One and Two define what’s been implemented so far—the exchange between the ERP (enterprise resource planning) and the MES (manufacturing execution system) or control system,” says Dave Emerson, director of the U.S. Development Center at automation vendor Yokogawa Electric Corp., in Newnan, Ga. “B2MML (business to manufacturing markup language) came out of Part One and Part Two of the ISA95 models.”

Part One —  Models and Terminology. Part One defines the scope of the manufacturing and control domain. It defines the organization of physical assets involved in manufacturing and defines the function associated with the interface between control functions and enterprise functions. This part also defines the information that is shared between control and enterprise functions.

Part Two —  Object Model Attributes. Part Two offers definition of attributes for all of the objects defined in Part One.

Part Three —  Models of Manufacturing Operations Management. Part Three offers a model of the activities associated with manufacturing operations and control in the production and MES layer.

Part Four —  Object Models and Attributes for Manufacturing Operations Management. The models and attributes from Part Four, which is still in development, are the basis for the design and the implementation of interface standards.

Part Five —  Business to Manufacturing Transactions. Part Five, which is still in development, defines operation between office and production automation systems, which can be used together with the object models from Part One and Part Two. The operations connect and organize the production objects and activities that are defined through earlier parts of the standard.

Related Feature - ISA95 Moves Toward Global Adoption
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