What Are CIMS and Manufacturing Systems?

Computer Integrated Manufacturing Systems (CIMS) is a manufacturing approach in which computer technology connects and coordinates all phases of a production enterprise, from product design and process planning through shop-floor execution and quality control. Rather than treating individual automated functions as isolated islands, CIMS creates an information backbone that allows each subsystem to share data in real time with every other. The concept was introduced by Joseph Harrington in his 1973 book of the same name and gained broad industrial attention through the 1980s as the cost of networked computing fell within reach of manufacturers.

CIMS integrates people, technology, and management under a unified data architecture. Research on Computer Integrated Manufacturing Systems published in IEEE conference proceedings describes the approach as the coordinated use of modern management technology, manufacturing technology, information technology, automation technology, and systems engineering, all working together to shorten product development cycles and reduce inventory. The system depends on closed-loop control processes based on real-time sensor input, allowing feedback from the factory floor to propagate immediately into planning and scheduling decisions.

Design and Engineering Subsystems

The design tier of a CIMS environment is built around computer-aided design (CAD) and computer-aided engineering (CAE) tools that produce digital models of parts and assemblies. These models serve as the authoritative source from which downstream processes derive their instructions. Computer-aided process planning (CAPP) translates the design geometry into sequences of manufacturing operations, specifying the machines, tools, and parameters required. The integration between CAD and CAPP, sometimes called the design-to-manufacture interface, is one of the most technically demanding aspects of CIMS implementation because it requires mapping geometric representations onto process knowledge in a structured, automatable way.

Manufacturing Execution and Automation

On the factory floor, CIMS relies on computer-aided manufacturing (CAM) systems to drive computer numerical control (CNC) machine tools, robots, and flexible manufacturing systems (FMS). A flexible manufacturing system groups CNC machines with automated material-handling equipment so that a family of part types can be produced in small batches without manual reconfiguration. Manufacturing resource planning (MRP II) systems translate production orders into schedules, material requirements, and capacity plans, ensuring that machines and materials are available at the right time. Computer integrated manufacturing as described in the ScienceDirect overview identifies the real-time database as the element that binds these subsystems together, since each machine, workstation, and planning tool reads from and writes to a common information store.

Quality and Enterprise Integration

Quality management in a CIMS environment moves beyond end-of-line inspection. Statistical process control monitors critical dimensions at the point of production, feeding measurement data back to process parameters in near real time. Enterprise resource planning (ERP) systems extend the integration upward from the shop floor to business functions including procurement, sales, finance, and human resources. This end-to-end connection means that a change in a customer order immediately propagates into production scheduling and materials procurement rather than waiting for a manual data entry cycle. The Wiley Handbook of Industrial Engineering chapter on Computer Integrated Manufacturing reviews the organizational and technical conditions under which this degree of integration delivers measurable improvements in lead time and cost.

Applications

CIMS has applications in a range of manufacturing and industrial sectors, including:

• Automotive assembly, coordinating body-in-white fabrication with powertrain and trim operations
• Aerospace manufacturing, managing complex multi-stage machining of structural components
• Semiconductor fabrication, linking lithography, deposition, and inspection equipment in wafer fabs
• Consumer electronics, synchronizing high-mix, low-volume production across global supply chains
• Pharmaceutical manufacturing, ensuring traceability and regulatory compliance throughout batch production