Purdue Enterprise Reference Architecture (PERA)

Purdue Enterprise Reference Architecture (PERA) is a 1990s reference model for enterprise architecture that can model the enterprise in multiple layers and in multiple stages of the architectural life cycle. It consists of five levels: 0. Physical Process - Defines the actual physical processes. 1. Intelligent Devices - Sensing and manipulating the physical processes. Process *sensors, analyzers, actuators and related instrumentation. 2. Control Systems - Supervising, monitoring and controlling the physical processes. Real-time controls and software; DCS, human-machine interface (HMI); supervisory and data acquisition (SCADA) software. 3. Manufacturing Operations Systems - Managing production workflow to produce the desired products. Batch management; manufacturing execution/operations management systems (MES/MOMS); laboratory, maintenance and plant performance management systems; data historians and related middleware. Time frame: shifts, hours, minutes, seconds. 4. Business Logistics Systems - Managing the business-related activities of the manufacturing operation. ERP is the primary system; establishes the basic plant production schedule, material use, shipping and inventory levels. Time frame: months, weeks, days, shifts.