The short answer
Issue one controlled RFQ package containing the project objective, crop and production plan, site survey, design climate and local code basis, greenhouse geometry, structural and cladding duties, environmental systems, irrigation and water data, electrical and controls interfaces, civil works, supply boundaries, exclusions, document schedule, delivery terms, installation responsibilities, commissioning tests, training, warranty process, spare parts, price breakdown, and bidder-deviation form. Require every bidder to return the same schedules instead of answering only with a brochure and total price.
When bidders receive different assumptions, the lowest number may represent the smallest scope rather than the best value. One offer may include freight, controls, supervision, foundation loads, drainage interfaces, and commissioning, while another leaves them for the buyer. The totals cannot be compared until those differences are exposed.
The RFQ should distinguish confirmed inputs from allowances and unknowns. A provisional soil bearing value, water analysis, grid capacity, or crop load should not quietly become a design fact. Name who will close each item, when it is needed, and what happens to price and schedule if the final input differs.
This guide supports procurement and project coordination. Project-specific values, contract terms, legal duties, and safety decisions remain with the buyer, qualified designers, logistics providers, contractors, insurers, and authorities responsible for the work.
Information to fix before requesting a firm offer
| Input group | Record | Decision supported |
|---|---|---|
| Project and crop basis | Location, crop, growing system, production calendar, target environment, biosecurity, operating hours, staff capability, expansion phase, and project priorities. | Defines what the greenhouse must support and which compromises require approval. |
| Site and design basis | Survey, coordinates, elevations, access, drainage, geotechnical data, wind, snow, temperature, radiation, rainfall, seismic basis, codes, permits, and neighboring constraints. | Supports structural, civil, logistics, and environmental design. |
| Greenhouse and systems | Dimensions, bay and span grid, gutter height, cladding, vents, screens, heating, cooling, circulation, irrigation, fertigation, lighting, controls, alarms, and utility limits. | Prevents core equipment and interfaces from being treated as optional. |
| Scope and delivery | Design responsibility, supply limits, local procurement, foundations, unloading, storage, installation, supervision, travel, freight, taxes, customs, insurance, and Incoterms rule with named place. | Shows which party carries each cost, task, and risk. |
| Evidence and commercial return | Drawings, calculations, data sheets, bill of materials, program, price breakdown, payment milestones, deviations, certificates, factory checks, commissioning, manuals, training, warranty, and spares. | Creates an auditable basis for evaluation and award. |
Mark every unknown as provisional and give it an owner and closure date. If a supplier proposes an alternative, require the offer to identify the changed assumption and its effect on scope, interfaces, performance, delivery, site work, risk, and price.
A practical review sequence
1. Write the operating brief before listing equipment
Describe what the crop and operations team needs the facility to do during normal production, seasonal transitions, cleaning, maintenance, extreme weather, utility interruption, and future expansion. Equipment names can then be evaluated against a duty instead of copied from a previous project.
2. Create drawings and interface schedules
Attach a site plan, greenhouse grid, typical section, equipment zoning concept, utility connection table, responsibility matrix, and document register. Identify boundaries such as the point where the greenhouse supplier's irrigation, power, drainage, network, and control scope ends.
3. Force structured bidder responses
Provide pricing, technical compliance, exclusions, deviations, utility consumption, lead time, document, warranty, and spare-parts forms. Require a direct response to each clause. A statement such as compliant except as noted is useful only when every exception is actually listed.
4. Run a clarification and risk review
Compare unresolved inputs, long-lead items, local approvals, proposed substitutions, access limits, shipping assumptions, site labor, commissioning conditions, and owner dependencies. Close material differences before asking for a final offer so late clarification does not become a change order.
Keep decisions in a controlled clarification register. When a drawing, bill of materials, shipment plan, or work method changes, the team can trace which quotation line, interface, delivery milestone, and acceptance record also needs revision.
Divide responsibilities at the interfaces
Owner and grower
Provide crop, site, utilities, operating priorities, acceptable risk, local resources, permits, insurance requirements, and approval authority.
Greenhouse supplier
Define the contracted design, supply, documents, packing, supervision, testing, training, exclusions, and interface data.
Local specialists
Confirm local codes, civil works, electrical and water connections, import rules, lifting, safety, labor, and professional approvals.
Project and logistics team
Control dates, changes, documents, inspections, transport, receipt, storage, installation readiness, punch items, and evidence.
A named party should be responsible for each deliverable, and another named party should accept it. Words such as complete, standard, by others, or site preparation are not adequate where two contracts meet.
Common failures to close before award
| Failure | Why it matters and what to do |
|---|---|
| The RFQ is a product wish list | Equipment is named without crop duty, climate, zoning, sequence, or acceptance criteria. Write the operating result and project boundary that each system must support. |
| Site data arrives after quotation | Foundation, drainage, transport, heating, cooling, and utility assumptions can change materially. Issue verified data or clearly priced allowances and closure dates. |
| Exclusions are hidden in narrative | Critical work is scattered through notes. Require one consolidated exclusion and by-others schedule tied to the responsibility matrix. |
| Only the total price is evaluated | A low total can omit freight, local works, tests, training, spares, or performance. Compare scope, technical risk, delivery, service, evidence, and life-cycle obligations alongside price. |
Record accepted deviations in the contract documents. A verbal promise or meeting note should be transferred to the drawing, schedule, specification, packing list, responsibility matrix, or test record that governs the work.
Define acceptance and evidence early
Agree which documents require approval, which components require factory checks, what will be inspected at dispatch and receipt, and what must be demonstrated after installation. State witnesses, notice periods, instruments, sample size, tolerances, photo requirements, nonconformance handling, retesting, and record format.
Connect supply and delivery checks to the greenhouse commissioning checklist. Use the greenhouse spare parts and handover list to confirm that manuals, settings, certificates, lists, tools, and agreed spares arrive with the correct shipment and remain identifiable through installation.
Payment milestones should refer to objective deliverables rather than calendar dates alone. The commercial contract and applicable law must be reviewed by qualified advisers, but the technical team can reduce ambiguity by defining the evidence that shows each deliverable is complete.
Questions the buyer should answer
Which crop, climate target, and operating mode define the duty? Which site and utility inputs are verified? What must comply with local law or insurer requirements? Where does each supplier system begin and end? What is purchased locally? Who unloads, stores, installs, connects, tests, and trains? Which documents are required before manufacture and shipment? What evidence releases each payment milestone? Which deviations are acceptable, and who can approve them?
Frequently asked questions
How detailed should a greenhouse RFQ be?
Detailed enough that two competent suppliers can identify the same duty, quantities, boundaries, interfaces, risks, and return format. Unknowns may remain, but they should be visible assumptions rather than silent gaps.
Should the buyer specify brands?
Specify a brand only when compatibility, service, standardization, or an approved-equivalent process justifies it. Otherwise define performance, environment, interfaces, documentation, maintainability, and acceptance.
Can a concept design be quoted as a fixed price?
Only within clearly stated assumptions and exclusions. If survey, geotechnical, utility, climate, code, or crop inputs are unresolved, identify allowances and the adjustment mechanism.
What should be included in the price schedule?
Separate engineering, structure, cladding, each environmental system, irrigation, controls, freight, supervision, commissioning, training, spares, options, taxes, local work, and exclusions so scope changes are visible.
Prepare a reviewable project package
Send the project location, crop plan, greenhouse area, site information, climate basis, water analysis, utility data, required systems, local-work plan, target delivery date, and preferred supply boundary. Chengfei Greenhouse can organize these inputs into a reviewable greenhouse proposal scope.
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