Switching Suppliers Is a Project, Not a Decision

Signals That Justify Leaving

Buyers leave suppliers for reasons that are mostly emotional, and stay for reasons that are mostly inertia. The signals worth acting on are the ones that repeat.

• A defect that comes back. One bad batch is a bad batch. The same defect in three shipments is a process the factory cannot or will not control.
• A silent change. A different material, a thinner gauge, a substituted component, discovered after the fact. This is the most serious signal, because it means the factory believes the specification is negotiable.
• Dates that slip by a predictable amount. A supplier who is always two weeks late is manageable if the two weeks are priced into the plan. One who is sometimes on time and sometimes a month late cannot be planned around.
• Documentation failures. Repeated errors on invoices, packing lists or certificates, especially where the error reaches a customs officer.
• No answer to a technical question. When the person who owns the process has left and nobody replaced them, the capability has gone even if the machines remain.

What does not justify a change on its own: a lower price elsewhere, a single late shipment, or a salesperson you do not like. Those are reasons to negotiate, not to move.

What Switching Actually Costs

The new supplier's quotation is the smallest line in the cost of changing. Four others are larger and less visible.

Tooling. Moulds, dies, jigs and print plates. Either they transfer, which takes time and is sometimes refused, or they are remade, which costs money and four to eight weeks.

Certification. A new factory means a new declaration of conformity, new test reports on a new sample, and possibly a new notified body involvement. On electronics this is a month and a real invoice.

Samples and approvals. Two or three rounds, each with a courier and a fortnight, before the first production run is even scheduled.

The learning period. A new supplier's quality is least predictable in the first two orders, which are exactly the orders where you have no alternative source. Plan an inspection on both.

Add these and the arithmetic changes. A ten percent saving on unit price against a tooling rebuild and two certification rounds is often a loss in the first year, and a gain in the second.

Tooling, Moulds and Who Owns Them

The single most common reason a buyer cannot leave a supplier is that the mould is in the supplier's building and the paperwork does not say who owns it.

Tooling paid for by the buyer belongs to the buyer. That sentence should appear in the purchase order, with the mould identified by a photograph, a number and the date it was made. Some buyers go further and have the mould marked physically with their company name, which settles the question in a warehouse argument.

Where the supplier pays for the tooling, the position is different and worth negotiating at the start: the buyer pays a tooling fee and takes ownership, or the buyer accepts that the mould is the supplier's and the product is not portable. Both are legitimate. What fails is an unstated position discovered at the moment of leaving.

Transfer itself is a logistics exercise. The mould has to be packed, moved and re-qualified at the new factory, which means a trial run and usually a sample approval. Two months is a realistic estimate, and it starts only after the old supplier agrees to release it.

Running Two Sources in Parallel

The safe way to change supplier is not to change, but to add. A second source takes a share of the volume while the first keeps the rest, and the share moves as the new supplier proves itself.

• Start with the smallest repeatable order the new factory will accept, not a sample and not a container.
• Split by product, not by unit. Two suppliers making the same item in parallel invites inconsistency on the shelf. Two suppliers making different items in the same family is easier to manage.
• Hold both for two to three orders. The first order is a project, the second is a process, the third is a habit.
• Compare on the same metrics: on-time rate, defect rate, documentation accuracy. A new supplier is not better until it wins on numbers you wrote down for both.

Carrying two suppliers costs a little in price, because neither gets the full volume discount. That premium is the insurance, and it should be compared with the cost of a stock-out rather than with the discount forgone.

Negotiating the Exit Before You Need It

Exit terms are easy to agree at the start and impossible to agree at the end. Three clauses carry most of the value.

Tooling release. On request, within a stated number of days, with the mould made available for collection by a named forwarder. Without a clause, release is a favour.

Outstanding orders. What happens to an order in production when the relationship ends: completed and shipped, or cancelled with the deposit treatment stated. Ambiguity here is how buyers end up paying for goods they no longer want.

Confidentiality and non-use. Your drawings, artwork and specifications remain yours and are not used for other customers. Enforcement across borders is slow, which is why the clause is a deterrent rather than a remedy, and a deterrent is enough most of the time.

None of this requires a lawyer for a small order. A purchase order with three extra paragraphs and a signature does the job, and it is the document both sides will look at when the relationship sours.

Covering the Gap

Between the decision and the first reliable shipment from a new source there is a gap, and the gap is a stock problem, not a sourcing problem.

Estimate it honestly: sample rounds, tooling, certification, first production, transit. For a product with no tooling and existing certification, three months. With tooling and a new test report, five months. Then compare that with the stock on hand and the sales expected in the interval.

Three ways to cover it. Buy a final larger order from the outgoing supplier, priced knowing it is the last. Extend the current stock with a short air shipment if the product value supports it. Or accept a stock-out on part of the range and protect the best-selling lines.

What does not work is to assume the new supplier will be faster than the plan. New suppliers are almost never faster than the plan, because everything they do is being done for the first time by people who have not done it together before.

The Decision Itself

A change is justified when the recurring cost of staying exceeds the one-off cost of moving, and when the buyer has the stock to absorb the gap. Both conditions, not either.

Write the case in one page: the specific failures with dates and quantities, the cost of each in claims, rework and air freight, the cost of the switch, the cover available during the gap, and the date the new source is expected to carry full volume. A page is enough, and writing it usually reveals whether the case is real.

Then act on it completely. Buyers who half-switch, keeping the old supplier on a small share out of politeness, end up paying for two relationships and getting the attention of neither. A clean transition, with the old supplier told plainly and paid properly for the last order, is the version that leaves both doors open.

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