Contract manufacturing: materials and testing
Check a manufacturer's reported board balance and a missing buyer-supplied test fixture before accepting a commitment to tested units and a delivery date.
Contract manufacturing means hiring an external manufacturer to make components, assemblies or finished products to agreed requirements. The work can cover one operation or a much wider production service. Before accepting a finished-unit date, establish what each party must provide and what the manufacturer must deliver.
That is a different question from make-to-order, which describes production starting against a customer order. Here, the focus is production performed by another company. The practical issue is whether materials, equipment, instructions and tests are ready for the particular job.
Define the manufacturing service you are buying
Some arrangements include the manufacturer's procurement of components. Others use components supplied by the buyer, or a mixture. Oracle's contract-manufacturing overview, for example, explicitly allows the original equipment manufacturer to supply some or all components in its documented process.
Specify the actual allocation. Terms such as turnkey, consignment and toll manufacturing are used differently across providers and industries. A label alone does not settle material ownership, permitted substitutions, loss, rework or charges. Check the applicable agreement and the scope accepted for this order.
Start with the approved part, revision, production site and operations. Then name the inputs and evidence at each handoff. The table below is a recommended working record, not a universal allocation of responsibilities.
| Scope to settle | Name the responsible party | Evidence or decision to retain |
|---|---|---|
| Configuration and production route | Who approves drawings, revisions, sites and changes? | Current documents, approved route and change approval |
| Purchased and supplied components | Who buys each input and delivers it to the agreed location? | Part/revision list, receipt, consumption and remaining-stock records |
| Tooling, test fixture and procedure | Who provides each item and confirms its suitability? | Identified equipment, current procedure and readiness confirmation |
| Testing and acceptance | Who performs and records the tests, and who may release output? | Results for the relevant units or lots and authorized disposition |
| Residual material, scrap and rework | Who reports quantities and approves their use or disposition? | Dated balance, reason for extra consumption and the required approval |
Use the RFQ guide when comparing scope and terms before ordering. This guide follows the operating responsibilities after that choice.
Worked example: assembled units still need a buyer-supplied fixture
This is a fictional electronics example, not a customer result. The accepted scope requires functional testing before output can be released. Its responsibility annex assigns the approved test fixture and current procedure to the buyer; the manufacturer must perform and record the test. Assembly before that test is permitted in this example's process.
The buyer has not delivered either test input. The manufacturer reports 120 assembled units awaiting functional test, with zero released as tested output. A general statement that testing is included in the service did not mean that the manufacturer would supply the fixture.
This separation exists in real provider documentation. Power Designers Sibex's published testing note assigns the functional-test procedure and/or fixture to the customer, with a fixture alternatively quoted separately. That is one provider's stated arrangement, not a rule for every manufacturer or the terms of this fictional order.
Assign the missing fixture and procedure to a named buyer owner. Engineering and quality must confirm the applicable version, setup and acceptance requirements under the agreed process. The manufacturer then needs a test plan and capacity for the 120-unit backlog. An assembly-completion report cannot supply those missing decisions.
Reconcile the supplied boards before planning another lot
At one common cutoff, the manufacturer's dated records report 200 boards received, 120 installed in the 120 assemblies and 80 unconsumed. All boards share the specified identity and approved revision. Each assembly uses one board. For this simplified past period, assume no opening stock, other receipts, returns, scrap or other consumption.
The recorded balance reconciles: 200 − 120 = 80 boards. It does not independently verify the present physical quantity or condition at the manufacturer's site. Obtain current count and status evidence according to your process before relying on the report.
The same report splits the 80 unconsumed boards into mutually exclusive states:
| Reported state at the cutoff | Boards | Available to the proposed next lot? |
|---|---|---|
| On quality hold | 20 | Excluded unless the authorized quality decision releases them |
| Allocated to another job expressly approved by this buyer | 10 | Excluded unless an authorized reallocation is agreed |
| Released as input stock, current revision and unallocated | 50 | Reported as usable and uncommitted; supporting evidence still needs review |
| Total unconsumed | 80 | 20 + 10 + 50; not 80 available to this job |
A proposed next lot of 60 assemblies needs at least 60 boards. Against the reported 50 usable, uncommitted boards, the nominal gap is 60 − 50 = 10 boards. No future setup or scrap allowance has been included; agree the actual requirement before committing output.
The ten-board gap does not mean ten boards are lost or that ten new boards must necessarily be purchased. An approved quality release or reallocation could change the position. Neither can be assumed. The 120 installed boards are already outside the raw-board balance; do not subtract the assemblies' test hold from the 80 again.
Even closing the board gap would leave the fixture, procedure and test backlog unresolved. It would not establish capacity, conforming output or a delivery date. Use the clear-to-build check for the wider production dependencies, and receiving inspection for the separate material-acceptance decision.
Obtain a commitment against the complete work
Ask the manufacturer to identify the receipt and issue records behind the balance, its cutoff, location, stock states and any unresolved physical discrepancy. Preserve the original report and later corrections with their source and time. A corrected ledger alone is not an independently verified count.
Keep two actions distinct: resolve the usable-board requirement through an authorized route, and deliver and confirm the agreed test inputs. Obtain a revised output commitment that includes the existing 120 units, any proposed next lot, required test capacity and release evidence. Do not imply that adding an assembly slot also creates a test slot.
Microsoft's subcontracting documentation illustrates why this separation matters: the external manufacturing service, material logistics and resulting output have distinct records and processes in that system. Your own ERP and operating agreement determine how you record them.
In Cartograph, open a named supplier question with an owner, due date and linked evidence in Inbox & Tasks. Scout Agent can follow up with the supplier within configured communication permissions and approval rules. People still verify stock, approve technical or quality decisions and authorize the production or delivery commitment. Closing a supplier question does not complete those decisions.
Questions teams ask
Does contract manufacturing mean the supplier buys every component?
No. Input sourcing varies. Name which party supplies each component and which location, revision and receipt evidence apply. This article's buyer-supplied-board example is one arrangement, not the definition of every contract-manufacturing relationship.
Does testing included mean the manufacturer supplies the fixture?
That wording alone does not establish fixture provision. Check the accepted scope for equipment, procedure, setup, test execution and acceptance. In the fictional case, the annex explicitly assigns the fixture and procedure to the buyer.
Are 80 boards remaining enough for another 60 assemblies?
The example reports only 50 released, current-revision and unallocated boards. That leaves a nominal ten-board gap before any future process allowance. The reported balance still needs current physical and status evidence; held or allocated boards cannot be assumed available.
Can the buyer stop every operation until the fixture arrives?
Follow the agreed process and the relevant authority. The example permits assembly before functional test; its blocked decision is a defensible tested-output and date commitment. The manufacturer must also plan testing for the existing 120 assemblies, rather than treating them as released output.