Industrial procurement
From RFQ to a verified operating result: stages, tests and acceptance
A signed contract is not the finish line. This guide follows one requirement from the RFQ to the day it is proven on site, and shows who owns each step and what evidence closes it.
Short answer
Carry each measurable requirement through every stage: define it, ask suppliers to propose against it, clarify gaps in writing, write it into contract deliverables, prove it at the factory acceptance test (FAT), prove it again on site in the site acceptance test (SAT) and commissioning, and close it with a documented final acceptance after a defined operating period. Assign an owner, evidence and timing to each stage, and manage every change through one written change-control process.
What are the stages from requirement to accepted result?
| Stage | Output | Owner | Evidence that closes it |
|---|---|---|---|
| 1. Requirement definition | URS with measurable targets | Buyer | Approved URS, acceptance criteria |
| 2. Market scan | Shortlist of capable suppliers | Buyer or its procurement team | Screening notes against criteria |
| 3. Qualified proposals | Responses on one format | Suppliers | Complete proposals, declared exclusions |
| 4. Bid clarification | Written answers, normalised scope | Buyer and suppliers | Clarification log shared with all bidders |
| 5. Contract deliverables | Scope, guarantees, tests, documents, schedule | Buyer and selected supplier | Signed contract with test protocols attached |
| 6. FAT | Performance proven at the factory | Supplier, witnessed by buyer | Signed FAT report, punch list |
| 7. SAT and commissioning | Performance proven on site | Supplier and buyer together | SAT report, commissioning records |
| 8. Final acceptance | Result confirmed in operation | Buyer | Performance-test data, acceptance certificate |
Key point: Every stage ends with a document, an owner and a date.
What is the difference between FAT and SAT?
A factory acceptance test (FAT) runs at the supplier's site before shipment. It checks build quality, functions, safety devices and, where possible, performance with representative product. Problems are cheaper to fix here.
A site acceptance test (SAT) runs after installation at the buyer's site, connected to real utilities, upstream and downstream equipment and operators. It proves the system works in its actual environment. Passing the FAT does not replace the SAT.
| FAT | SAT | |
|---|---|---|
| Where | Supplier's factory | Buyer's site |
| When | Before shipment | After installation and connection |
| Focus | Build, functions, safety, available performance | Integration, utilities, real product, operators |
| Typical payment link | Shipment milestone | Commissioning or acceptance milestone |
Which deliverables should the contract define?
- Guaranteed performance values and how each is measured
- FAT and SAT protocols, pass criteria and who witnesses
- Documentation: drawings, manuals, certificates, spare-parts lists
- Training content and duration
- Schedule milestones linked to payments and retention
- Warranty start, remedies and the final acceptance trigger
How do commissioning and final acceptance work?
Commissioning brings the installed system into stable operation: cold checks, utility connection, functional tests, then production runs. Final acceptance should follow a defined performance test over an agreed period, using the same measurement method as the original target. Record the results against the baseline from your brief.
How should change control and escalation work?
Changes are normal; uncontrolled changes are not. Use one written process for every change, whoever requests it.
- Log the change request with reason and requester
- Assess effect on scope, performance, cost, schedule and tests
- Approve or reject in writing by the named authority
- Update contract documents and test protocols
- Escalate disputes in defined steps: project leads, then management, then the contract's dispute mechanism
What evidence should you keep at each step?
- Clarification log and final normalised scope
- Signed FAT report with punch list and closure dates
- SAT and commissioning records with measured values
- Change register with approvals
- Final acceptance certificate and performance data
Key point: If it is not documented, it was not accepted.
How do you link milestones, payments and success criteria?
Write success criteria before the RFQ goes out, and tie each payment to a milestone that produces evidence. That way the supplier is paid for proven progress, and the buyer keeps leverage until the result is shown.
| Milestone | Success criterion | Evidence | Typical payment link |
|---|---|---|---|
| Design approval | Drawings and layout meet URS and site data | Approved design documents | Design or order milestone |
| FAT passed | Agreed functions and performance shown at factory | Signed FAT report, punch list | Shipment milestone |
| Delivery | Complete, undamaged, documented | Delivery checklist | Delivery milestone |
| SAT and commissioning | Integrated operation on site with real product | SAT and commissioning records | Commissioning milestone |
| Final acceptance | Guaranteed KPIs met over the agreed period | Performance-test data, acceptance certificate | Retention release |
Key point: No milestone without a success criterion and the evidence that proves it.
How should long-lead commitments and financing readiness enter the RFQ?
Define release gates in the RFQ before award. Work backwards from the required operating outcome, including design approval, component procurement, FAT, shipment, site readiness, SAT and ramp-up. Parallel activities must be mapped rather than simply added together.
| Gate | Required evidence | Owner / timing |
|---|---|---|
| Before award | Confirmed production slot, component dependencies, dated delivery plan and commercial validity | Supplier evidence; buyer review before commitment |
| Before long-lead release | Approved specification, interfaces, change authority and agreed payment/security terms | Buyer and supplier before purchase release |
| Before shipment | Agreed FAT report, open-item disposition, current freight/insurance quote and ready site | Supplier and buyer at the shipment gate |
| Before financial commitment | Updated CAPEX/OPEX, cash-flow timing, delay scenario and documents requested by the external provider | Buyer; optional external review with consent |
External financing review is optional and requires the buyer’s consent. Global B2B Group is not a bank or lender and does not approve credit or terms. Model an unfunded case as well as any financing actually offered; do not assume approval, a rate, or drawdown timing. Agreed tests and contract review remain the buyer’s and supplier’s responsibilities.
The five-step method: from outcome to accepted result
The same sequence applies across sectors. Each step produces one document the next step depends on; skipping one usually shows up later as non-comparable bids or disputed acceptance.
- Define the outcomeCapacity, quality, uptime and budget range the project must reach — before any supplier is named.Project brief tool
- Scope-first RFQOne scope, one battery-limit list, one response template for every bidder.RFQ builder
- Normalize bidsFill exclusions, align Incoterms, currency and options so prices are compared on the same basis.Weighted scorecard
- Landed cost and ROIAdd freight, duties, installation, energy and spares; test the payback under low/base/high assumptions.CAPEX / ROI calculator
- Acceptance criteriaMeasurable FAT/SAT tests and payment milestones written into the contract, not agreed after delivery.Acceptance guide
Buyer checklist: what each step must produce
| Step | Ready when you have | Common gap |
|---|---|---|
| Outcome | Target output, quality spec, site constraints, budget range (USD 250,000+ projects) | Equipment named before the need is quantified |
| RFQ | Single scope, utilities/battery limits, required response format, deadline | Each supplier quotes a different scope |
| Normalization | Exclusions priced, same Incoterm and currency, options separated | Comparing EXW to DAP prices |
| Landed cost / ROI | Freight, duties, install, commissioning, energy, spares, sensitivity range | Payback quoted from equipment price only |
| Acceptance | Test protocol, pass/fail values, retention or milestone tied to SAT | Acceptance defined as 'machine runs' |
Method questions buyers ask
What is a scope-first RFQ?
An RFQ written from the required outcome and a single scope, so every supplier prices the same thing. It replaces a request for 'your best machine' with measurable requirements and a fixed response template.
How do free tools help before supplier matching?
They turn an idea into numbers — capacity, budget range, landed cost and payback assumptions — so the project team can scope the RFQ and approach suppliers with comparable requirements. The tools produce planning estimates, not quotes.
Why normalize bids instead of picking the lowest price?
Quotes differ in scope, delivery terms and exclusions. Normalization adds the missing items to each bid so the comparison reflects the full cost you will actually pay.
When should I use a sector calculator instead?
When the project is clearly cold storage, hatchery, aquaculture, feed or seed specific. The sister sites below hold the sector tools; this page covers the cross-sector method.
Sector-specific calculators
For sector sizing and transactional requests, use the specialist sister sites:
- ColdMatchCold storage and cold-chain tools
- HatchMatchHatchery and poultry calculators
- FishMatchAquaculture, fish and shrimp calculators
- FeedMatchFeed mill calculators
- SeedMatchSeed processing projects
Method reviewed by the Global B2B Group project team · October 14, 2026
Method references:
Free, optional tools
Use the framework on your own, or with these free tools. Nothing here commits you to anything.
- Factory acceptance test checklistA staged FAT protocol with a free PDF.
- Example RFQsSee how complete requests are structured.
- RFQ BuilderTurn the brief into one structured request.
- CAPEX calculatorA planning estimate of total installed cost.
- Debt capacity calculatorPlanning view of what cash flow could service — not a credit assessment.
- RFQ readiness scoreCheck the request is complete before it goes out.
Sector-specific projects
Global B2B Group covers cross-sector industrial projects. Single-sector projects are handled in depth by the group's specialist platforms.
Frequently asked questions
Should we order long-lead items before financing is approved?
Not automatically. Record who carries the unfunded exposure, cancellation cost, specification-change risk and payment obligations. Obtain the appropriate internal approvals and professional contract advice; a calculator or readiness checklist is not financing approval.
What should a factory acceptance test checklist include?
Each RFQ requirement as a test line, with its test conditions, measurement method, tolerance and pass/fail criterion, plus safety checks, documentation, a categorised punch list and sign-off. The free FAT checklist on this site gives a staged structure to adapt with your engineers.
What is the difference between FAT and SAT?
A FAT tests the equipment at the supplier's factory before shipment, usually under simulated conditions. A SAT tests it after installation at your site with real utilities, product and connected equipment. Some criteria, such as line throughput and interfaces, can only be proven at SAT.
Can we skip the FAT and rely on the SAT?
Sometimes, for simple standard equipment. For custom or integrated systems, a FAT usually finds problems when they are cheaper and faster to fix. Decide in the RFQ, not after the order.
Who should witness the FAT?
Someone who knows the process and the acceptance criteria — usually the buyer's engineer or production lead, sometimes with an independent inspector.
When should final acceptance happen?
After the system has run for an agreed period under normal conditions and met the performance test defined in the contract.
How do we handle a failed test?
Record the failures on a punch list with owners and dates, agree the fix and retest. Link any payment or retention release to closure.
Does Global B2B Group run FATs or sign acceptance?
No. The buyer and the selected supplier are responsible for testing and acceptance. Our team helps structure the RFQ so the tests and deliverables are defined from the start.
Define the tests before the order
Start from the free FAT checklist and example RFQs. If you share a brief, our team structures the RFQ so acceptance criteria and test protocols are part of every proposal.
Managed RFQ support applies to projects from USD 250,000. Buyer tools are free; no price, availability, financing or outcome is guaranteed.
Sources and frameworks
Next in this series: Managing a multi-supplier procurement project: installation, commissioning, KPIs, warranty and continuous improvement
Overview framework: Start with the Outcome: A Practical Framework for Better Agrifood Procurement
General procurement guidance only. World Bank documents are cited as useful methodology frameworks; they are not binding on private buyers. Confirm legal, technical and regulatory requirements with qualified advisers.
