When production leaves your facility, control should not leave with it
Subcontracting adds a vendor to the production route, but material ownership, quantity, quality, timing, purchasing, work in progress, and cost still need one connected record.
Updated September 26, 2026 · Practical ERP capability guide
Why manufacturers outsource an operation
A vendor may provide specialized treatment, certification, equipment, labour, or temporary capacity. The business problem is not merely buying a service. Materials or semi-finished goods may move to the vendor and return after a defined operation, with quantity loss, lead time, inspection, and service cost affecting the production order.
The questions hidden behind “subcontract manufacturing ERP”
Subcontracting can mean buying a service for a routing operation, sending owned material to a vendor location, receiving a semi-finished item back, or coordinating several outside steps. The model must state who owns the material, what quantity is expected, how scrap is treated, how service quantity is calculated, and when production may advance.
Material visibility does not end at the warehouse door
Teams need to distinguish material available internally, material in transit, quantity at the subcontractor, accepted return, rejected return, and supplier scrap. Transfer documents, packing information, vendor locations, lot or serial tracking where applicable, and expected dates help preserve that visibility.
A partial return should not close the entire requirement. An over-delivery, under-delivery, substituted material, or unexplained loss needs an exception path. Quality inspection may block the returned quantity until acceptance, while production planning needs an accurate view of what can proceed.
Cost depends on more than the service invoice
The actual cost may include the subcontracted service, transportation, packaging, insurance, duties, handling, scrap, rework, and price variance. Some agreements price by processed unit; others use time or job. The selected basis should connect purchase receipt and invoice activity with work-in-process and the production order.
Performance measures can include supplier lead time, on-time return, yield, outside-process cost per good unit, rejection rate, material variance, and invoices that do not match received service. These measures support sourcing decisions without pretending that lower service price always means lower total cost.
Simor ERP connects subcontracting with suppliers, purchase records, production orders, materials, receipts, quality, and costing. The implementation can adapt documents, approvals, vendor communication, rate logic, and reports to the actual commercial relationship.
Background reading: Microsoft guidance on subcontracted production work and activity-based subcontracting and cost treatment.
- Which production order and operation require outside work?
- What material was sent, and does the company still own it?
- How much did the vendor receive, complete, reject, or return?
- Which purchase order or service charge represents the work?
- Does receipt complete the operation or require quality approval?
- How does outside cost reach WIP and finished-product cost?
Simor ERP subcontracting
Subcontracting is part of the connected manufacturing scope alongside BOMs, routings, work centres, resources, production and work orders, material issue, time, quality, scrap, cost rollups, purchasing, inventory, and accounting. The workflow can represent sending an operation or material to a contractor and receiving the resulting product or completed service.
Supplier, purchasing, receipt, and invoice records provide commercial control. Production records identify the operation and quantity. Inventory movements explain where material is held, while cost analysis incorporates the outside service and related material impact.
A controlled sequence
- Release the production order and identify the subcontracted operation.
- Select the approved vendor, service, quantity, price, and required date.
- Record material or semi-finished goods sent to the vendor location.
- Track outstanding quantity and supplier status.
- Receive completed work with quantity and reference evidence.
- Perform required quality checks and record rejection, rework, or scrap.
- Connect supplier invoice and actual cost to production.
- Reconcile material, service, WIP, and completed quantity.
Failures to rehearse
Test partial return, excess loss, rejected work, late delivery, duplicate receipt, changed price, vendor invoice before completion, cancelled production, and material remaining at the contractor. Each exception needs a correction path that preserves history.
Example: sending material for an outside operation
A production order may require coating, heat treatment, specialized machining, or another operation performed by a supplier. The business must know which material or semi-finished quantity left its control, which purchase commitment covers the service, what the supplier returned, and whether the returned quantity and quality satisfy the production requirement.
The receipt should not be treated as an ordinary purchase of finished inventory if ownership, work-in-process, and material consumption tell a different story. The outside-service charge, freight or other applicable costs, rejected quantity, and timing variance may all affect actual production cost. Production status should advance only when the required operation and acceptance conditions are satisfied.
A strong test sends a partial quantity, records supplier scrap, receives an over- or under-delivery, rejects part of the return, and changes the service price. Users should be able to trace the vendor document, production order, material movement, quality decision, receipt, invoice, and cost effect without manually reconciling separate trackers.
Subcontracting scenarios worth rehearsing
Create an outside operation with owned material, an agreed service rate, expected lead time, and required quality check. Send a partial quantity, record material at the vendor location, receive only part of it, and preserve the remaining balance. Repeat with supplier scrap, over-delivery, rejection, and rework.
Post the related purchase receipt and invoice using the commercial basis agreed with the vendor. Add transportation or another incidental cost and verify its treatment in work-in-process and actual production cost. A price or quantity variance should remain visible rather than disappearing into an unrelated expense account.
Review traceability from production order to material movement, vendor document, returned quantity, quality result, invoice, and cost. Then test cancellation and supplier change. Planning should show the current expected completion while finance retains the history of commitments and received service.
Fit the process to the vendor relationship
Simor Soft can adapt dispatch documents, vendor locations, approvals, status, quality gates, costing, alerts, reports, and integrations. Continue with manufacturing quality checks, review the manufacturing module, or map an outside operation with our team.