production order

A production order is a formal instruction within a manufacturing planning or execution system to produce a defined quantity of a product or intermediate, using specified materials, resources, and work steps. It is a central transactional object in ERP and MES environments that links planning, execution, and reporting.

Key characteristics

In regulated and industrial manufacturing, a production order commonly includes:

• Identified product or material: Finished good, subassembly, bulk, or intermediate material number.
• Planned quantity: Target quantity to be produced, often with tolerances.
• Bill of materials (BOM): List of required components, raw materials, or consumables and their planned quantities.
• Routing or operations list: Sequence of process steps, machines, work centers, or cells where work will occur.
• Dates and scheduling data: Requested start and finish dates, scheduled times, and sometimes priority.
• Status information: Lifecycle states such as created, released, in process, technically complete, or closed.
• Traceability fields: Order number, batch/lot identifiers, version numbers, and links to specifications, recipes, or work instructions.
• Cost and settlement data: Planned vs. actual labor, machine time, and material consumption for cost tracking.

A production order may be created manually by planners or automatically by systems such as MRP, finite schedulers, or MES order-management modules.

Operational role

In day-to-day operations, the production order acts as the primary container for execution and feedback:

• On the shop floor: It is used to dispatch work, allocate operators and equipment, and record completions and scrap.
• In MES: It may be broken down into operations, jobs, or work instructions, with detailed data captured against the order.
• In quality systems: It links in-process controls, inspections, deviations, and batch records to a specific manufacturing campaign.
• In ERP: It is used to update inventory, confirm material consumption, and post production costs when the order is confirmed or closed.

Relation to ISA-95 and other models

Within the ISA-95 context, a production order commonly aligns with the concept of a work order or production schedule element sent from business planning and logistics systems (Level 4) to manufacturing operations management (Level 3). It provides the high-level demand and constraints that lower-level control, recipe, or batch systems interpret into detailed execution.

Common variations by system

Different vendors and sites may use slightly different terminology:

• ERP systems often use the term production order (or process order for process industries) as the main manufacturing order object.
• MES and scheduling tools may refine a production order into operations, work orders, jobs, or tasks while keeping the original order as the top-level reference.
• Batch and continuous processes may map a single production order to multiple physical batches, runs, or campaigns, or conversely may group multiple orders into a shared run.

What a production order is not

• It is not the same as a purchase order, which requests materials or services from suppliers.
• It is usually not the detailed control recipe or PLC program; rather, it references or triggers these in control systems.
• It is not a complete quality record by itself, although it is often the primary key that quality and batch records reference.

Common confusion

Terms such as production order, process order, work order, and manufacturing order are sometimes used interchangeably. In many plants:

• Production order / manufacturing order refers to the ERP-level object that drives planning, costing, and inventory updates.
• Work order or job may refer to more granular execution units dispatched to specific lines or work centers.

When integrating MES, ERP, and control systems, it is important to clarify how each system defines and uses production order and how it maps to related objects such as batches, jobs, and equipment campaigns.