Moving drawings
Revisions can affect quantities, connections, coating, price, and production release.
EPC Procurement Support
China-side Control for EPC Steel Structure Procurement
YYN helps EPC procurement teams organize quotation scope, factory matching, production schedules, document status, inspection coordination, written changes, packing, and export handover through one China-side communication window.
Submit an EPC Requirement
Direct Answer for EPC Buyers
YYN supports the coordination layer between the EPC team and matched Chinese production resources. The service is designed to make scope, revisions, schedule, records, inspection roles, packing, and handover easier to track without claiming to replace the EPC engineer, local approval authority, or appointed inspector.
EPC Procurement Pressure
Steel supply affects more than the purchase price.
Scope gaps
Missing accessories, documents, packing, or inspection items can appear after award.
Schedule interfaces
Production and document delays can affect shipping, site work, and the wider project plan.
Split responsibility
Factory, logistics, inspection, engineering, and site parties need a clear issue route.
Quotation & Scope Control
A comparable quotation starts with a written basis.
Production Plan & Risk
Track the baseline, current status, variance, and next action.
A production update should show more than photos. The working format can include the planned milestone, actual status, reason for variance, recovery action, open buyer decisions, and the next expected update.
BaselineConfirmed milestone plan
CurrentSample: assembly in progress
VarianceSample: coating color confirmation pending
Next actionWritten confirmation before coating release
Document Control
Use visible document status instead of scattered email memory.
PreparingSubmittedCommentedConfirmedFinal handover
| Document group | Typical records | Control point |
|---|---|---|
| Drawings | Revision register and production release status | Current revision identified |
| Materials | Agreed material documents | Contract document requirement confirmed |
| Inspection | Factory QC or third-party records | Responsible inspection party identified |
| Packing and shipment | Marks, packing list, loading and transport references | Handover checklist completed |
| Final dossier | Agreed final document index | Delivery status recorded |
Inspection Boundary
Coordination records are not inspection certificates.
YYN can coordinate inspection dates, document requests, hold points, and record collection according to the contract. Formal inspection is performed by factory quality control or the project-appointed third party. YYN daily photos and follow-up notes do not replace that formal role.
Written Change Control
Every change should have a source, impact, and confirmation.
The change register can record the originating document, affected scope, price impact, schedule impact, responsible party, confirmation status, and the updated drawing or supply basis.
Typical change triggers
- Drawing or quantity revision.
- Material or standard change.
- Coating, fireproofing, or galvanizing change.
- Inspection or document requirement change.
- Packing, delivery, or destination change.
Installation Risk Reduction
Records can reduce uncertainty, but local engineering remains local.
Freeze drawings, interfaces, connection details, bolt scope, and written changes.
Coordinate agreed dimensions, holes, member marks, accessories, and trial assembly when separately required.
Match marks to drawings, organize accessory boxes, packing sequence, loading records, and installation file handover.
YYN does not replace the local structural engineer, site survey, approval authority, installation contractor, factory quality control, or appointed third-party inspector.
Project Control Format Library
Fourteen sample formats for scope, progress, records, and handover.
These expandable examples use simulated and redacted wording. They show possible document structures only and do not represent a real customer, project, certificate, approval, or third-party inspection.
1. Project Information CollectionInquiry intakeFormat sample
- Buyer role
- EPC / owner / contractor / buyer
- Project facts
- Country, use, stage and required date
- Available files
- Drawings, BOQ and specification status
2. Drawing & Technical RegisterRevision controlFormat sample
- Document
- File name and drawing number
- Revision
- Current revision and received date
- Status
- For review / confirmed / superseded
3. Quotation Scope & ExclusionsCommercial clarityFormat sample
- Included
- Main steel, secondary steel and agreed accessories
- Excluded
- Items outside the written supply boundary
- Assumptions
- Coating, packing and delivery basis
4. Factory Matching EvaluationProduction resource reviewFormat sample
- Technical fit
- Member size, welding and equipment
- Schedule fit
- Available production window
- Export fit
- Packing, records and destination needs
5. Project Kickoff SheetOrder startFormat sample
- Sample project ID
- YYN-SAMPLE-001
- Confirmed revision
- Rev. B — sample only
- Open items
- Questions requiring buyer confirmation
6. Baseline Production PlanPlanned milestonesFormat sample
- Milestones
- Material, cutting, assembly, welding and coating
- Target dates
- Planned dates subject to formal order
- Dependencies
- Drawing freeze and material release
7. Weekly Progress ReportPlan versus actualFormat sample
- Current stage
- Sample completion status
- Variance
- Schedule difference and reason
- Next step
- Planned action before next update
8. Issues & Actions LogOpen decisionsFormat sample
- Issue
- Question or risk description
- Owner
- Buyer, YYN, factory or appointed party
- Due status
- Open / pending confirmation / closed
9. Drawing & Scope Change LogWritten change controlFormat sample
- Change source
- Buyer, engineer or project document
- Impact
- Scope, price and schedule review
- Approval
- Written confirmation status
10. Packing & Loading CheckShipment preparationFormat sample
- Member marks
- Package and erection references
- Accessories
- Bolt and small-part box checklist
- Loading
- Container, seal and sequence record
11. Export Document IndexHandover file listFormat sample
- Commercial
- Invoice and packing list status
- Shipment
- Booking and transport references
- Project files
- Agreed final record directory
12. Arrival & After-sales LogChina-side coordinationFormat sample
- Reported item
- Shortage, damage or technical question
- Evidence
- Photos, marks and packing reference
- Action
- Review and coordination status
13. EPC Document Submission StatusDocument controlFormat sample
- Document
- Required submission name
- Status
- Preparing / submitted / commented / closed
- Next due date
- Sample deadline field
14. Inspection Coordination SheetRoles and hold pointsFormat sample
- Inspection party
- Factory QC or appointed third party
- Hold point
- Contract-defined witness or release stage
- YYN role
- Scheduling and record coordination only
Supplier Prequalification Information
Provide real documents when they exist; label formats when they do not.
YYN can organize available company information, process descriptions, report formats, factory matching methods, packing examples, and real production-resource information for project review. Legal entity documents, certificates, references, and project evidence are provided only when authentic and approved for disclosure.
Start with project facts
Send your drawings, scope, destination, and required delivery date.
YYN will review the available information, identify missing quotation inputs, and reply with the next practical step for factory matching and supply review.