A shop order is a formal, traceable instruction to manufacture a defined quantity of a product, part, or assembly on the shop floor. It typically originates from production planning or an ERP/MRP system and authorizes execution of a specific manufacturing job within a defined time frame.
What a shop order includes
While details vary by plant and system, a shop order commonly includes:
- Product or part identifier (item number, revision, description)
- Planned quantity to produce and allowable scrap or yield assumptions
- Routing or sequence of operations to perform
- Required materials and components, often from a bill of materials (BOM)
- Target start and completion dates or schedule window
- Assigned work centers, lines, or cells
- References to controlled documents, such as work instructions and specifications
- Identifiers used for traceability (order number, batch/lot links, customer reference)
In regulated manufacturing environments, the shop order often acts as a key object for linking production records, material traceability, equipment usage, and quality data.
Operational role in manufacturing systems
Operationally, a shop order is used to:
- Release work to the shop floor based on an approved production plan
- Drive material staging, picking, and backflushing
- Collect labor, machine time, and production quantities by order
- Record in-process inspections, nonconformances, and rework
- Capture genealogy, such as which lots of material were used for which finished units
In many MES and ERP implementations, the shop order is the primary link between planning (MRP), execution (MES), quality records, and inventory movements.
Common confusion
Shop order vs work order: In some plants the terms are used interchangeably. Where a distinction is made, a shop order usually refers specifically to production of a product or part, while a work order can also cover maintenance, calibration, facilities work, or service tasks.
Shop order vs production order / manufacturing order: These terms commonly refer to the same concept. The preferred label often depends on the ERP or MES vendor.
Context in regulated manufacturing
In regulated or highly audited environments, a shop order commonly serves as a central reference for production records. Batch records, device history records, electronic batch records, and related logs may all reference the shop order number to show what was made, how it was made, and which materials and equipment were used.