A polished website and a low quotation do not show whether a supplier can engineer an integrated fruit processing line. Before shortlisting a supplier in China, ask for project-specific evidence and score the response. The aim is to find who understands your product, can coordinate the line and accepts responsibility for delivery.
Use a simple evidence score
Score each area from 0 to 2. Give 0 when the point is missing, 1 when the supplier gives a general explanation or a sample from another project, and 2 when the response is tied to your raw material, product, capacity, package and site. A total score does not replace technical review, but it exposes where a proposal still depends on assumptions.
| Area | Evidence to request | What earns 2 points |
|---|---|---|
| Process basis | Raw material, finished product, capacity basis and process flow | The flow and equipment choices are explained against your product conditions |
| Line integration | Capacity balance, transfer, controls, CIP and utility interfaces | Upstream and downstream sections are checked as one operating line |
| Manufacturing | Factory identity, in-house work, outsourced scope and inspection records | Responsibility for every main equipment group is named and verifiable |
| Acceptance | FAT plan, test medium, limits, records and defect closure | Acceptance criteria are agreed before manufacturing is complete |
| Site delivery | Installation, local labour, utilities, commissioning and training boundary | Buyer and supplier responsibilities are listed item by item |
| After-sales support | Manuals, drawings, spare parts, response route and support period | Documents and support commitments are included in the project scope |
Start with the process basis
A capable supplier should ask what enters the factory and what must leave it. Mango puree, apple juice, tomato paste and coconut milk cannot be treated as versions of one standard line. Viscosity, fibre, particles, acidity and heat sensitivity affect pumps, refining, transfer, thermal processing and filling.
Mark the capacity basis on the flow diagram. Fresh fruit intake and finished output are different numbers. The fruit processing line overview lists the inputs that normally change a configuration.
Check the interfaces, not only the machine list
An integrated line fails at its interfaces more often than in a catalogue description. The pulper must feed the downstream section at a usable rate. Pumps and valves must handle the product. The sterilizer and filler need compatible flow, pressure and cleaning conditions. CIP coverage must match the tanks, pipelines and equipment that actually contact the product.
Ask for a capacity balance and an interface list that assigns controls, connections, utilities and commissioning at each boundary.
Verify the factory and the contracting responsibility
The contracting company, manufacturer and exporter may be one entity or several. That is not automatically a problem. The risk appears when nobody can say who designs, manufactures, inspects and warrants each section.
Use a factory visit, live video, equipment identification, drawings and production records to confirm the arrangement. For outsourced equipment, ask who approves the vendor, checks quality and solves an interface fault. Public information such as a supplier's manufacturing facilities is only the starting point. Project records provide the stronger evidence.
Fix acceptance before the equipment is finished
A factory acceptance test should match what can be tested before shipment. A water test may confirm flow direction, controls and leakage, but it cannot prove how a line handles thick puree. A standalone machine run cannot prove a connection that has not been assembled.
Define the test medium, run time, measured items, limits, records and retest method in advance. The four-sheet acceptance checklist shows how to separate the goods check, single-machine run, loaded run and defect closure.
Write the overseas delivery boundary line by line
"Turnkey" is not a complete scope description. One project may use the supplier's supervisors and the buyer's local labour. Another may give the supplier a wider installation role. The quotation should state who provides site piping, cables, insulation, lifting, utilities, commissioning materials, travel, accommodation, operator training and spare parts.
How to read the score
A low score shows that the proposal is still too general for a purchasing decision. Compare suppliers on the same project brief and close the missing boundaries before comparing price.
Frequently asked questions
Is a factory visit always required?
No. Live video, drawings, production records and third-party inspection can answer many questions. For a large integrated line, a visit can still help verify engineering and manufacturing resources.
Do certificates prove turnkey capability?
No. A certificate covers a defined system or product scope. It does not prove that a proposed line suits the buyer's product or that all equipment interfaces have been coordinated.
Should every supplier reach 12 points?
Not at the first contact. Use the score to decide which gaps must be closed before technical selection, contract signing or manufacturing.
Supplier evaluation works best when every major promise points to a drawing, specification, test record or named responsibility.