Three quotations arrive against one specification, and the spread is wide enough to look like a mistake. It usually is not: the three suppliers priced three different scopes, and the difference sits in the tooling line, the certification line or the packaging setup rather than in the unit price. Five decisions turn those three numbers into one choice.
How to choose a charger manufacturer: the five decisions
Five decisions screen the field: the supplier type, the platform evidence, the specification response, the process answer and the commercial structure.
Each decision removes a class of wrong choice rather than adding points to a score, which is why the order matters. Deciding the supplier type first removes candidates that cannot serve the brief; deciding the commercial structure first invites a comparison between a platform programme and a development project.
The exercise is deliberately narrow. A charger programme is decided by a small number of facts, and a supplier that can answer the five questions with evidence is a different supplier from one that answers with enthusiasm.
Decision 1: which supplier type fits the brief
Platform manufacturer, trading company or design house, and each serves a different brief.
A platform manufacturer owns the design and the line, which is what makes a branded build fast and repeatable. A trading company offers range and commercial flexibility, usually without owning the line. A design house develops and places the work, which suits a programme that needs a new design but not a factory relationship. Asking which of the three a candidate is, in writing, removes the most common misunderstanding in this category.
Decision 2: the platform evidence
What is running this month, not what appears in a catalogue.
Ask for the closest platform to the brief with its coil or output arrangement, the enclosure revision and the test limits. The evidence is what turns a platform claim into a fact, and it also tells you how much of the brief is already covered and how much is a development task. A supplier whose closest platform is a drawing is proposing a project, which is a legitimate answer provided it is priced as one.
Decision 3: the specification response
The response to a written specification reveals how the supplier works.
Send the same document to every candidate and look at the shape of the reply: does it restate the specification line by line, does it mark what stays inside the tested envelope and what does not, and does it name the certification scope per market. Where the reply is a price and a lead time, the supplier is quoting rather than engineering, and the gaps will be filled after the order.
Decision 4: the process answer
What is measured on every unit, at what limit, and where the limit came from.
This is the question that separates two suppliers with identical quotations. A factory that can name its test stages, its limits and the source of those limits is describing a process; one that describes its equipment is describing capacity. The answer also predicts how a later complaint will be handled, because a process that records values can trace them and one that records flags cannot.
Decision 5: the commercial structure
One cost structure, issued to every candidate, so the numbers describe the same thing.
Ask for the unit price, the tooling line where it applies, the packaging setup, the certification work and the accessory cost as separate lines, with the minimum quantity and the lead time for the quoted configuration. Two quotations that price different scopes are not comparable, and the difference is usually in the lines the buyer did not ask for.
| Decision | What it screens out | Evidence to ask for | Weak answer |
|---|---|---|---|
| Supplier type | Candidates that cannot serve the brief | Entity, site and role stated in writing | A category avoided |
| Platform | Development projects quoted as platforms | Revision, arrangement, test limits | A catalogue or a rendering |
| Specification response | Quotations that are not engineering replies | A line-by-line response to the document | Price and lead time only |
| Process | Capacity described as control | Test stages, limits and their source | An equipment list |
| Commercial structure | Quotations pricing different scopes | The five cost lines, separated | One total figure |
Scoring without pretending it is arithmetic
A simple scorecard helps, provided the criteria carry weights that mean something.
Score the five decisions against the brief, with the weights agreed before the answers arrive so that the weighting is not fitted to a preferred supplier. The useful output is not a final number but the two or three areas where a candidate is weak, because those are the questions for the next conversation. Where two candidates score closely, the difference is usually in the process answer rather than in the price.
What to do when two suppliers tie
Run the pilot with both, or ask a question that only one can answer with evidence.
The tie usually breaks on the platform evidence or on capacity: one supplier can show the platform running and the other cannot, or one can name the line and the months available. Where both answer well, quoting a pilot order to each is a legitimate way to compare processes rather than documents, and it is cheaper than choosing wrongly.
FAQ
How many suppliers should be compared at this stage?
Three with comparable answers, each given the same specification and the same cost structure. Comparing two rarely shows the range of the market, and comparing five produces answers that repeat without adding information. Compare three suppliers given the same specification and the same cost structure, because two rarely shows the range and five produces answers that repeat without adding information.
Should price be part of the decision?
It is one of the five decisions rather than the first, and it is only meaningful once the scope is identical. Where two quotations differ substantially, compare the tooling, certification and packaging lines before the unit price. Price is one of the five decisions rather than the first, and where two quotations differ substantially compare the tooling and certification lines first.
What if the best supplier is a trading company?
Then the qualification shifts to the line behind it: which factory produces the platform, whether the brand’s specification is issued to that factory, and who holds the certification file. A trading company can serve a programme well when those three are answered. The qualification shifts to the line behind it: which factory produces the platform, whether the specification is issued to it, and who holds the certification file.
Does a factory visit change the decision?
It confirms it. The visit is most useful after the five answers, because it can then concentrate on the two or three points the answers left uncertain rather than on a general tour of the site. The visit confirms the decision rather than making it, and it is most useful after the five answers so it can concentrate on the uncertain points.
How long should the choice take?
Two to four weeks for a platform programme, most of it waiting for answers and quotations. Where the brief is a new design, the screening takes longer because the specification response has to be read as an engineering document. Two to four weeks for a platform programme, most of it waiting for answers, while a new design takes longer because the response is read as an engineering document.
Next step
Send the specification, the markets and the forecast to Wecent Group through the contact page. The reply answers the five decisions for the configuration: the platform and its revision, the changes that stay inside the tool, the certification scope, the process behind the limits and the five cost lines. Related reading: OEM and ODM charger manufacturing, charger manufacturing services and the factory floor. External references: IEC standards, IEC Webstore, UL standards and certification, EU CE marking rules, ICC Incoterms rules and TUV testing services.
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