FACTORY AUDIT
Factory audit resources for steel structure suppliers
Use these checklists to verify whether a fabricator can produce, document, pack, and deliver a large steel structure package.
Quick answer: Factory audit resources for EPC buyers reviewing steel structure supplier capacity, production flow, welding control, coating records, and export readiness.
Buyer-focused answer
Practical answer for this section
Use this section when a supplier's capacity, equipment, welding control, coating control, and subcontracting claims need practical evidence before award.
Main question
What factory evidence should EPC buyers request before awarding a steel structure package?
Practical answer
Factory audit resources for EPC buyers reviewing steel structure supplier capacity, production flow, welding control, coating records, and export readiness.
When to use this page
Use this section when a supplier's capacity, equipment, welding control, coating control, and subcontracting claims need practical evidence before award.
What to verify
workshop flow, monthly output evidence, equipment checks, welding and coating controls, inspection records, and subcontracted work limits
Evidence behind this guidance
This section connects the answer to practical buyer evidence, including workshop flow, monthly output evidence, equipment checks, welding and coating controls, inspection records, and subcontracted work limits, and then points readers to the detailed checklists for the next review step.
Related next step
Last reviewed
2026-07-02
Contact
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Priority reading for factory audit review
Start with the production capacity checklist when EPC buyers need to verify realistic output, workshop bottlenecks, and schedule support before award.
Steel structure material cutting line audit checklist
Audit cutting equipment, nesting records, dimensional control, heat number transfer, part marking, and release to assembly.
Audit cutting line control Factory AuditSteel structure coating line audit checklist
Steel structure coating line audit checklist for EPC buyers reviewing blasting, painting, drying, DFT records, coating storage, and inspection control.
Review checklist Audit ChecklistFactory audit checklist for steel structure suppliers
Review capacity, material traceability, welding control, coating process, documentation, and export readiness.
View checklist Capacity ReviewSteel structure production capacity checklist
Check workshop flow, equipment, monthly output, subcontracted work, and current workload before award.
Check capacity Welding EquipmentSteel structure factory audit welding equipment checklist
Review welding machines, calibration, fixtures, consumable control, welder assignment, and maintenance evidence.
Audit welding equipmentAUDIT EVIDENCE
Factory Audit Evidence Buyers Should Request
Example workshop flow evidence for steel structure factory capacity audit should show how material moves from cutting to assembly, welding, coating, finished goods, and export packing. The evidence should support the supplier's claimed monthly output instead of only showing selected workshop photos.
FAQ
Buyer decision table
| Review area | Buyer decision | Evidence to keep |
|---|---|---|
| Process flow | Does workshop flow match the promised output and package sequence? | Layout review, work-in-progress records, output history |
| Critical equipment | Are cutting, welding, blasting, coating, and inspection resources available? | Equipment list, maintenance status, calibration records |
| Subcontracting | Which processes leave the audited factory and how are they controlled? | Approved subcontractor list and inspection controls |
Evidence checklist
- Current workshop photographs
- Equipment and calibration list
- Production loading plan
- Subcontracted process controls
Red flags
- Audit evidence is generic or undated
- Critical work is subcontracted but not disclosed
- Claimed output does not match workshop flow or staffing
Practical example
A supplier presents high monthly capacity, but the audit shows one shared blasting line and a full order book. The buyer tests the promised schedule against actual bottleneck hours before award.
Related guides
Common questions for this section
What is the fastest factory-audit starting point?
Start with production capacity because schedule risk usually appears before price or document issues become visible.
What should be compared with supplier claims?
Compare claimed output with active workshop bays, equipment availability, material flow, labor allocation, subcontracting, and recent production evidence.
Is a factory audit only a visual visit?
No. It should combine workshop observation with records, sample documents, inspection evidence, and schedule assumptions.