| Minimum evidence | Legal entity, factory location, product scope and named contact. | Current product data and configuration-specific documents relevant to the brief. | Formal quotation, payment terms, warranty, lead time and quality process. | Packing method, freight dimensions, handover point and support contact. |
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| Higher-risk project evidence | Comparable project references, engineering ownership and manufacturing-process detail. | Project drawings, calculations where relevant, applicable test reports, materials and documented submittal register. | Inspection plan, sample / mock-up approval, production controls, non-conformance process and spare-parts plan. | Container / break-bulk plan, labelled packing, unloading assumptions, erection or installation guidance and replacement pathway. |
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| Common warning sign | Unclear legal entity, changing factory story or product range far broader than credible manufacturing depth. | Certificates that do not identify the quoted system, outdated evidence or documents from another product without explanation. | Very low price with undefined scope, vague warranty, no documented QC or changing payment terms. | No packaging dimensions, unrealistic freight assumptions or unclear responsibility after shipment. |
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| Apollo decision question | Is this the right legal and technical counterparty for the project? | Can the exact quoted configuration be supported by the evidence the project actually requires? | Can the supplier deliver consistently, commercially and on programme? | Can the product reach the destination, be handed over clearly and be supported after delivery? |
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