Most sourcing projects that end badly did not fail at the discovery step. They failed at the definition step and then discovered very efficiently. The order below is not a preference — each stage produces the input the next one needs, so skipping one does not make you faster, it makes the following decision worse on information you will not question until production.
Why the order matters
The expensive mistakes in sourcing are all the same mistake: comparing options that are not comparable. Two quotes on different Incoterms. Two factories whose capability was never tested against your specific product. A certificate whose scope covers a line you are not buying. A hand-made sample next to one made on the line.
The sequence
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Define the product in manufacturing terms
Not the marketing description: construction, materials, critical dimensions with tolerances, finish, pack. If you cannot write it, nobody can quote it, and every quote will be for a slightly different product.
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Decide which manufacturing process it actually needs
This is the decision everything downstream inherits, and the one most often skipped. The process determines which factories can make it at all, the tooling cost, the minimum, and what a design change costs later.
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Choose plausible regions, and say why
A trade-off between the depth of the local supply base for your process, unit cost, freight and transit time, tariff treatment, and how easily you can get someone into a plant. Note that tariff treatment follows the origin of the goods, and for non-preferential purposes EU rules place origin where the last substantial transformation happened — not where the invoice was raised.
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Build a long list, from more than one channel
Marketplaces, trade shows, industry directories, certification scheme directories, referrals from non-competing brands, forwarders, sourcing partners. Each is blind in a different way, so two or three beats working one harder.
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Establish what each company is
A factory, a trading company, an agent, or a reseller of another catalogue. Ask directly, then check the address on the business licence and whether they can name the plant.
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Verify capability against your product
Not the company and not the category. Ask for the nearest thing they already make, the specification they made it to, and what that particular line runs when it is not running your product.
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Verify capacity against your volumes
Both directions: can they hold your peak without putting you behind a larger customer, and is your order big enough that they run it properly rather than as an interruption.
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Check certificates for scope and validity, not existence
Read the scope line, the dates and the issuing body — then verify with the issuing body rather than with the supplier.
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Issue one identical RFQ to the whole shortlist
Same document, quantities, Incoterm, currency, packing and deadline. Anything left to the supplier’s discretion becomes a variable you cannot see in the comparison.
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Sample against a written reference
Development rounds with a comment sheet each, then a pre-production sample made on production equipment and signed off by both sides as the reference for the run.
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Rebuild every quote as a landed cost
The ranking usually changes at this step, which is the reason for doing it.
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Audit, and take references about a problem
A third-party audit for the site, and a reference call with another buyer. Ask what went wrong once and what the supplier did — that separates a shortlist far better than a product question.
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Negotiate the terms, not only the price
Payment terms, tolerance on quantity and delivery, who pays for rework, the inspection standard, what happens to a rejected lot, and how long a price holds.
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Put the IP position in writing before tooling is cut
Register the mark where you sell and, where it matters, where you manufacture. Agree who owns patterns, moulds and artwork, and where the tooling physically sits.
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Start production against the signed reference
With an inspection plan agreed in advance: who inspects, against which document, at what stage, and what happens if the lot fails.
Which manufacturing process does your product need?
Two products that look alike on a shelf can be made by entirely different industries. A moulded part, a machined part, a sewn product and a filled-and-packed product share almost no supply base. Settling this early narrows the search from "manufacturers" to a specific set of plants, and makes the rest of the questions answerable:
- Which process makes the primary part, and is that settled or still a design question?
- What does it cost to set up once, before the first good unit — tooling, moulds, patterns, plates, screens?
- What does a change cost afterwards? Some processes absorb a revision cheaply; others need new tooling, which turns a small change into a new project.
- Which secondary processes follow — finishing, printing, assembly, packing — and does the same plant do them, or does the order travel?
Factory or trading company?
Worth asking plainly, because the answer changes what you can verify and who is accountable. There is no villain in the question: a trading company is sometimes the right answer, and a factory is sometimes the wrong one.
| Direct to factory | Trading company or agent | |
|---|---|---|
| Price structure | No intermediary margin, but you absorb the coordination cost | A margin you may not see, sometimes offset by real buying leverage |
| What you can verify | The plant, the line, the people who would run your order | Their sourcing judgment; the plant only if they let you see it |
| Minimums | Set by factory economics, usually higher | Often lower, because they consolidate across buyers |
| Multi-component products | You coordinate every supplier and hand-off | One counterparty coordinates, which is the main thing you are buying |
| Quality accountability | Sits with the maker, undiluted | Contractually theirs, which helps only if they can enforce it upstream |
| Where it fits | A settled product, real volume, one dominant process | A small first order, a multi-factory range, or a region you cannot reach |
The failure mode is not the margin — it is a trading company presenting itself as the factory, because then everything you verified is about the wrong company. Whichever it is, insist on knowing, then check what you were told: how to vet an overseas manufacturer covers the documents, and the factory vetting guide covers the site visit.
What a comparable RFQ contains
Quotes that are not comparable are the single most common reason a careful process produces a bad decision. The buyer does the work, collects six numbers, ranks them, and picks a supplier who quoted a different product on different terms. Everything below has to be the same across the shortlist, and stated by you rather than assumed by them.
- In the RFQ, identical for every supplier
- A specification document with a version number, and a statement that quotes are against that version.
- Critical dimensions with tolerances, and what counts as a defect. Without this, "quality" is a word.
- Quantities at fixed break points — the same ones for everyone — so you see the volume curve, not one number.
- One Incoterm, named with the place, and Incoterms 2020 stated explicitly.
- One currency, and how long the price is valid.
- Packing and labelling: inner pack, carton, carton dimensions and weight, and who supplies artwork.
- Any tooling, mould, pattern or plate cost broken out from the unit price, with who owns it.
- Sample cost, sample lead time and courier cost, separate from production.
- Lead time from approved sample and from deposit, as two numbers rather than one.
- Payment terms requested, so you compare the cash position and not only the price.
- The inspection standard and stage you intend to apply.
- The certification scope you require, described by what it must cover rather than by scheme name alone.
- Your destination market, so the supplier can flag a compliance problem before you find it.
- One response deadline and a named contact.
Reading a certificate properly
Most buyers check that a certificate exists. Few check what it covers, whether it is current, and whether it means what the supplier implies. The schemes are explicit about their own limits, which makes this easier than it sounds.
| Scheme | What the document covers | What to check |
|---|---|---|
| OEKO-TEX STANDARD 100 | Tested articles against limit values for harmful substances, in one of four product classes that get stricter as skin contact increases | It is issued for one year. Check the number and the article scope, not the logo |
| GOTS Scope Certificate | That the named site is certified for the listed processes and product categories | Validity may not exceed one year from issue, and the certificate states it is no proof the goods delivered are GOTS certified — that needs a Transaction Certificate for the shipment |
| amfori BSCI | A social audit result graded A to E across thirteen performance areas — explicitly not a certification and not a pass or fail verdict | The grade and the date. A or B runs to a full audit within two years; C, D or E triggers a follow-up audit between two and twelve months later |
Verify with the issuing body, not from a PDF the supplier sent. amfori made the reasoning public when it announced it was discontinuing system recognition of several third-party schemes: uploaded PDF certificates "can be forged, contain human error, and may not reflect the current validity status". GOTS requires every certification body to publish how its certificates can be authenticated — an address that confirms validity within two business days, a lookup page, a per-certificate address or QR code, or the signing certificate itself. Use the route the scheme publishes, and keep the categories apart: these are schemes a buyer or supplier chooses, while product safety, chemical and labelling rules for your destination market are obligations that a voluntary certificate does not discharge.
Comparing quotes on landed cost
A unit price is not a decision input until it is delivered to the same place as every other unit price. The Incoterms 2020 rules put every cost a rule allocates into one article, A9/B9, so which side pays for what can be read rather than guessed — and DAT was renamed DPU in the 2020 edition, so an old term in a quote is worth a question.
Landed cost per unit = (goods + freight + duty + clearance + insurance + inland) ÷ sellable units received
Sellable units, not units ordered. Rejects, shortfall within an agreed tolerance and rework all belong in the denominator.
Two costs sit outside that line and still belong in the comparison: tooling, amortised over the units you honestly expect to make, and the cash cost of the payment terms. Line by line: the landed cost guide.
Where this goes wrong
- Discovery before definition. A long list built before the specification exists is a list of suppliers for a product nobody has described.
- Certificates read as logos. Scope and validity carry the information; the logo carries none.
- Capability assumed from category. "We make bags" says nothing about whether that line holds your tolerance in your material.
- A sample nobody signed. Without a written approved reference, inspection has nothing to inspect against and every disagreement becomes an opinion.
- Cheapest wins. The cheapest factory is rarely the best choice, and the gap usually appears as rework, delay and rejected stock rather than as a higher price.
- Tooling paid for and never located. If nobody recorded where the mould is and who owns it, switching supplier costs the tooling again.
How Library of Trade runs this
We are not a marketplace or a factory directory, and you contract directly with your suppliers. What we do is run the sequence above as managed work: turning a brief into a specification suppliers can quote against, searching a network of vetted factories and material suppliers, issuing a genuinely comparable RFQ, and comparing what comes back on landed cost rather than unit price. AI does the structuring, searching and comparing across far more combinations than a person could evaluate by hand; our sourcing team makes the judgment calls, negotiates and validates, and a recommendation reaches you as something to approve rather than something already decided. See how Library of Trade works.