ISA-95 Standard

Establishes the enterprise domain responsible for long-range strategic planning and financial orchestration.

• Scope: Plant production scheduling, inventory management, order processing, and procurement.
• Key Systems: Enterprise Resource Planning (ERP) platforms.
• Timeframe: Operates on shifts, days, weeks, or months.
• Function: Defines the what and why of production based on market demand, not the how.

The critical bridge layer that translates business objectives into actionable production workflows and analyzes execution results.

• Core Activities: Detailed scheduling, dispatching, quality assurance, and performance analysis.
• Key Systems: Manufacturing Execution Systems (MES) and Laboratory Information Management Systems (LIMS).
• Timeframe: Operates on hours, shifts, and days.
• Function: Manages the how of production by coordinating resources, defining work instructions, and recording genealogical data.

Oversees the automated execution of physical processes by monitoring and directing multiple localized controllers.

• Mechanism: Supervisory Control and Data Acquisition (SCADA) systems and Distributed Control Systems (DCS).
• Interaction: Reads data from PLCs and adjusts setpoints to optimize stability.
• Timeframe: Operates on seconds and minutes.
• Function: Provides the human-machine interface (HMI) for operators to visualize and supervise automated sequences.

The physical interface layer where digital logic meets mechanical actuation and analog measurement.

• Actuators: Programmable Logic Controllers (PLCs) executing ladder logic to open valves, start motors, or position robotic arms.
• Sensors: Devices measuring physical properties like pressure, flow, temperature, and proximity.
• Timeframe: Operates in real-time, often in milliseconds or microseconds.
• Function: Executes the closed-loop control algorithms that maintain physical process equilibrium.

Represents the actual physical, chemical, or mechanical transformation of raw materials into finished goods.

• Elements: Conveyors, reactors, cutting tools, and packaging lines.
• Data Origin: The source of all raw telemetry and the destination for all control commands.
• Timeframe: Continuous or batch physical processes.
• Function: The ground truth of manufacturing reality that all higher levels seek to model and optimize.

An XML implementation of the ISA-95 data models that standardizes the electronic exchange of information between Level 4 and Level 3 systems.

• Purpose: Provides a vendor-neutral transaction format for production schedules, performance metrics, and material definitions.
• Benefit: Eliminates proprietary point-to-point interfaces by using a common schema.
• Structure: Defines schemas for Personnel, Equipment, Material, and Process Segment resources.
• Integration: Acts as the semantic bridge ensuring ERP and MES systems share a unified definition of capacity and capability.