The direct answer
Give each supplier the same project brief and compare written deliverables against it. Identify the contracting company, match technical evidence to the offered model, and separate product, logistics and installation responsibilities. Good procurement makes unanswered questions visible before an order is approved.
Identify who will fulfil the order
Request the legal business name, operating address and named project contact. Clarify whether you are dealing with a manufacturer, distributor or installer and who provides after-sales support. If factory capability matters, request a dated walkthrough or an independently arranged inspection with a scope agreed in advance.
Connect every claim to a document
Ask for the complete relevant report, not just a logo or cover page. Check the product identity, issuing organization, test configuration and stated scope. A coating document, motor approval or fabric test describes its own subject; it does not automatically establish the performance of the assembled pergola.
Use one comparison sheet
Create columns for each supplier and rows for model, drawing revision, dimensions, options, documentation, packing, delivery, installation and warranty exclusions. Write “not confirmed” wherever an answer is missing. Return that sheet for clarification so a cheaper proposal is not rewarded for leaving out a necessary item.
Close the gaps before order approval
Keep the approved specification, drawings, sample references and responsibilities together with the order. Record how changes will be priced and approved, what evidence will be supplied before dispatch and how discrepancies will be reported. Define acceptance steps before production, rather than trying to reconstruct the agreement after delivery.
Before you request a quotation
- Supplier identity and named service contact verified
- Comparable scope with missing items marked
- Approved drawings, samples and change procedure