Enterprise Resource Planning

Enterprise Resource Planning (ERP) is an integrated business information system used to manage and coordinate core processes across an organization. In manufacturing and other industrial operations, ERP typically covers areas such as order management, purchasing, inventory, production planning, finance, and human resources within a single, shared data model.

ERP is primarily focused on planning and accounting for the business side of operations. It consolidates data from multiple functions so that organizations can manage demand, materials, capacity, and costs in a coordinated way. In regulated manufacturing environments, ERP often serves as a system of record for orders, material masters, bills of material, routings, standard costs, and financial postings.

How ERP is used in manufacturing

In an industrial and regulated context, ERP systems commonly:

• Manage customer orders, sales contracts, and delivery commitments
• Handle purchasing, supplier records, and incoming materials
• Maintain item masters, bills of material (BOMs), and basic routing data
• Run material requirements planning (MRP) and capacity planning at a business-wide level
• Track inventory quantities and valuations across plants and warehouses
• Record production confirmations at a summarized or order level
• Integrate with finance for cost accounting, general ledger, and invoicing

ERP often integrates with Manufacturing Execution Systems (MES), Laboratory Information Management Systems (LIMS), quality systems, and other OT/IT applications. In these setups, ERP typically holds the commercial and planning data, while shop floor systems manage detailed execution, quality records, and traceability.

ERP vs MES and other systems

ERP and MES are complementary:

• ERP plans and accounts for work: orders, materials, capacity assumptions, and financial impact.
• MES manages how work is actually executed on the shop floor, including detailed scheduling, operator instructions, data collection, and traceability.

In practice, boundaries can blur, particularly where ERP vendors offer basic execution or quality features, and MES vendors offer planning or order management capabilities. In regulated, brownfield plants, ERP and MES usually coexist and integrate rather than replace each other.

What ERP includes and excludes

ERP commonly includes:

• Commercial and administrative processes (sales, procurement, finance)
• High-level production planning and MRP
• Master data management for materials, customers, and suppliers

ERP generally does not include:

• Real-time machine control or automation functions (handled by OT systems such as PLCs, DCS, or SCADA)
• Detailed operator workflows, work instructions, and in-process data collection (typically handled by MES or electronic batch records systems)
• Specialized laboratory or test management features (often handled by LIMS or dedicated quality systems)

Common confusion

ERP vs. MRP: Material Requirements Planning (MRP) is a planning method or module that is often part of an ERP system. ERP is the broader suite that includes MRP along with finance, sales, purchasing, and other functions.

ERP vs. MES: ERP focuses on business planning and accounting; MES focuses on manufacturing execution and detailed production records. Some modules overlap, but they serve different primary purposes.

Context in regulated manufacturing

In regulated industries, ERP often supplies controlled master data (such as item definitions and BOMs) and formal records of orders, inventory movements, and financial postings. Other systems may hold more granular batch, device history, or quality records, but typically integrate with ERP for consistent identifiers, quantities, and status information.