Production Subcontracting: The Parts Left for Coating, but the Return Date Is a Guess

The route says “coating: two days.” The batch leaves on Monday, so the planner expects it back on Wednesday.

The subcontractor starts on Thursday. Friday's collection is missed, and receiving inspection takes place the following Monday. The two-day operation has occupied a week in the order's journey.

Subcontracted production needs visible handoff dates and status. Its duration includes the time around processing, just as manufacturing lead time includes waiting inside the factory.

Follow the batch through the boundary

For each outside operation, identify the quantity dispatched, its batch reference, subcontractor receipt, agreed completion and expected return. Track accepted returns separately from goods merely received.

Parts at the subcontractor remain part of the order's progress. They should not disappear into a general “sent out” status with no owner or next check.

Record what the subcontractor has actually confirmed. A standard lead time and a confirmed slot are different planning inputs.

Two days of work, six days of elapsed time

Consider a hypothetical batch with:

• One working day for outbound transport.
• Two working days waiting for the subcontractor's slot.
• Two working days of processing.
• One working day for return transport.

It spends six working days outside the plant before receiving inspection. If inspection needs another half-day, the next internal operation can begin only after that release.

The processing price may be accurate while the routing time is incomplete. Weekends, collection cut-offs and partial deliveries can extend the elapsed interval further.

A partial return may help one shipment

Suppose a customer needs 100 units first and the complete batch contains 400. The subcontractor can return the first 100 early.

Check whether transport, identification and inspection can handle the split. The first delivery helps only if those 100 are accepted and the remaining internal operations have an available slot.

Do not count the same quantity as both returned and still at the subcontractor. Reconcile dispatched, returned, rejected and outstanding quantities.

Make exceptions visible

Focus follow-up on batches whose confirmed return threatens a customer commitment. A daily call about every open batch creates noise; an order with tomorrow's final assembly slot deserves a specific action.

Possible actions include an agreed partial return, an approved alternate subcontractor or a revised customer delivery. Each option needs a cost and feasibility check.

Connect the returning batch to its dependent operations and sales order, so a new return date reaches the people who promised delivery.

Use a real outside operation in the demo

For factory.online, ask the team to demonstrate your exact subcontracting process, including ownership of dispatched stock, partial returns and acceptance. Confirm the supported workflow rather than assuming outside processing behaves like an internal machine.

Book a demo with one open subcontracted batch. Follow it from dispatch to final customer shipment; the missing dates usually reveal where the plan needs attention.