What ISA‑95 is for
ISA describes ISA‑95 as an international set of standards for integrating enterprise and control systems. It defines models and terminology that help organizations discuss manufacturing operations consistently.
Levels are conceptual boundaries
The familiar levels help separate enterprise planning, manufacturing operations and control activities, but real systems often span boundaries. A historian, quality platform or scheduling tool may serve multiple functions.
Object and activity models
ISA‑95 provides models for personnel, equipment, material and process-segment information, together with manufacturing operations activities. These are useful for interface design and master-data alignment.
Integration value
A standards-based vocabulary reduces debates such as whether “line,” “work center,” “equipment,” “resource” or “operation” means the same thing in ERP, MES and automation systems.
Do not turn the model into an org chart
The standard is a framework, not a mandate that each box must correspond to one software application. Good architecture follows business responsibility and data lifecycle rather than forcing products into a picture.