An electronics brand has approved an assembly made by a contract manufacturer. The samples passed, the first deliveries were accepted, and the monthly quality report looks ordinary. Then the buyer learns that a subcontractor has taken over a critical coating step. Nobody at the brand was told before production changed.
This is an illustrative scenario, not a reported incident. The subcontractor may be competent, but the buyer cannot establish whether the original approval still covers shipments.
Outsourcing changes who operates the factory. It does not automatically settle who must know about a process change, who can authorize a deviation, or who bears the cost when suspect product reaches the customer. Set those boundaries before a quality incident.
A Supplier Audit Is Not a Right to Make Decisions
An audit can show that a factory has documented procedures, calibrated equipment and people who understand the process. It cannot guarantee that the same process will be used for every subsequent order. Certification cannot substitute for part-, site- and customer-specific requirements.
The more useful question is where the buyer's decision rights begin and end. Can the manufacturer change a critical sub-tier operation without notice? Can it ship lots produced during an unresolved deviation? Who determines whether additional testing is sufficient? Is the buyer entitled to see the records needed for that decision?
Inspection access provides information. Change notification provides warning. An agreed hold mechanism can prevent suspect supply from moving pending authorized quality disposition. None gives the category manager authority to override engineering, customer or regulatory approval.
Quality control in outsourced manufacturing depends on enforceable decision boundaries, not the illusion of owning someone else's production line.
Separate the Quality Decision From the Commercial Response
A supplier's quality team controls its manufacturing process and carries out containment within its facility. The buying company's designated quality function assesses whether delivered or proposed product meets its acceptance requirements, with engineering and the customer involved where applicable. Procurement manages supplier commitments, commercial remedies and continuity options. Operations decides how the approved supply situation affects the production schedule, within its delegated authority.
| Situation | Quality or technical decision | Procurement's commercial role |
|---|---|---|
| Critical process or sub-tier change | Assess whether requalification, validation or customer approval is required | Enforce notification terms; review timing, volume and cost effects |
| Suspected nonconforming lot | Identify affected lots; determine containment, testing and permitted disposition | Apply agreed shipment controls and recovery arrangements |
| Corrective action submitted | Verify effectiveness before lifting relevant restrictions | Track supplier obligations, replacement supply and claims |
The distinction matters when a factory asks to ship against a deadline. Procurement can organize an escalation and negotiate alternatives. It should not accept a temporary quality concession on behalf of a function that has not authorized it. Conversely, quality approval alone does not amend a commercial commitment or guarantee usable capacity.
Make Process Changes Visible Before They Become Shipments
The decisive information is usually narrower than a request for unrestricted factory data. For a risk-critical assembly, the buyer needs to know which approved site and processes produce it, where critical subcontracted operations occur, which specification revision applies, and how finished lots can be traced back through those steps.
Change control should identify the events that require advance notification or approval under the applicable agreement: manufacturing-site moves, material substitutions, altered critical processes, changes to specified sub-tier sources and significant changes to test methods. The technical owner decides whether the proposal affects the approved product or process. Procurement ensures that notification and approval obligations are reflected in the commercial relationship.
There is an important difference between receiving a change notice and approving the change. A supplier's email stating that a new coating facility will be used next week is evidence that notice was given. It is not evidence that required validation has been completed, or that customer consent has been obtained.
For regulated drug manufacturing, the US FDA's November 2016 guidance on quality agreements illustrates why manufacturing responsibilities should be explicitly allocated between parties. It applies to drug manufacturing subject to current good manufacturing practice requirements; it should not be presented as a mandatory contract template for every industrial component. The broader management lesson is that a commercial supply agreement and the applicable technical quality arrangements must work together.
A Hold Must End in a Defensible Disposition
Return to the coating change. First, the manufacturer and buyer's quality teams need to establish which lots, dates and production routes are affected. Suspect stock may need to be held at the factory, in transit or on receipt, depending on the agreed controls and the seriousness of the concern. The designated quality authority decides what testing, review or approved deviation is necessary before affected goods can be used.
Procurement addresses the supply consequences in parallel: replacement lots from an already approved route, a revised delivery commitment, or a contractual claim where the facts and terms support it. None of those options turns unapproved goods into approved supply.
Containment and corrective action answer different questions. Containment prevents further exposure while facts are established. Corrective action addresses the underlying cause. Closing a supplier action report confirms neither that every affected lot has been dispositioned nor that the fix has worked. Restrictions should be lifted only after the relevant quality owner accepts the evidence and any required customer or regulatory approvals are complete.
The buyer need not direct an outsourced factory's daily work. It must be able to identify consequential changes and act before the next shipment makes the decision irreversible.
You do not need to run the factory. You do need to know who can stop the wrong product from leaving it.