IFR / IFA / IFC / AFC Document Status
IFR, IFA, IFC, and AFC are the standard engineering document status codes that mark a deliverable's stage in the EPC lifecycle. IFR (Issued For Review) is for inter-discipline review, IFA (Issued For Approval) is for client approval, IFC (Issued For Construction) is the construction-ready release at mechanical completion, and AFC (As-Built For Construction) reflects the actual installed configuration after construction.
Full Definition
IFR, IFA, IFC, and AFC are the four primary document status codes used across EPC engineering deliverables (P&IDs, isometrics, datasheets, layout drawings, instrument loop diagrams, electrical schematics). Each status represents a formal lifecycle stage where the deliverable is reviewed, approved, released for construction, and ultimately reconciled against built reality. The status codes appear in the document number, the revision block, and the master document register (MDR). See the MDR automation product for the document lifecycle tracking.
Context & Detail
IFR (Issued For Review)
IFR is the first formal issue of an engineering deliverable to other disciplines for review. P&ID IFR releases trigger instrument index review, line list review, equipment list review, and HAZOP study scope review. The deliverable carries an IFR revision (typically rev A, B, or 1, 2 depending on convention) and the review feedback is consolidated through the inter-discipline check (IDC) workflow. IFR is internal to the EPC contractor; the client is not yet formally part of the review.
IFA (Issued For Approval)
IFA is the formal issue of an engineering deliverable to the client for approval. After internal IDC review and incorporation of comments, the deliverable is released as IFA. The client engineering team reviews the deliverable, raises comments per the project review protocol, and ultimately approves or rejects. IFA cycles often run 2-4 rounds before client approval. The IFA revision typically uses a different revision marker (rev 0, A1, A2 depending on convention) to distinguish from IFR.
IFC (Issued For Construction)
IFC is the release for construction at mechanical completion stage. After client approval and final IDC verification, the deliverable is released as IFC. The construction contractor receives IFC drawings as the basis for fabrication, erection, and commissioning. IFC carries the construction-grade revision (typically rev 0 or rev 1) and represents the engineering baseline before installation. Mid-construction revisions (issued as further IFC revisions) reflect engineering changes during construction.
AFC (As-Built For Construction)
AFC is the final document status reflecting the actual installed configuration after construction. The construction contractor records field changes (deviation from IFC drawings) and the EPC contractor reconciles these into AFC drawings. AFC drawings represent the true plant configuration and become the engineering reference for plant operations, modifications, and asset performance management. AFC is the input to brownfield digitisation and digital twin programmes.
EPC Usage
- 01
Every EPC project tracks IFR / IFA / IFC / AFC status on hundreds to thousands of deliverables through the Master Document Register (MDR). The MDR lifecycle is a critical project management artefact.
- 02
P&ID lifecycle is the most visible: P&IDs typically go through IFR, IFA (multi-round), IFC, and AFC stages over 18-36 months on a greenfield project. P&ID revisions trigger downstream impact on instrument index, line list, equipment list, and HAZOP closure.
- 03
Indian PSU projects follow PSU-specific document control conventions on IFR / IFA / IFC / AFC. Each major Indian PSU has its own document numbering convention and revision marker scheme.
- 04
Multi-EPC packages (where multiple EPC contractors deliver different scopes on a single mega-project) require coordinated IFR / IFA / IFC / AFC scheduling so deliverable handover between contractors does not block the critical path.
- 05
Brownfield revamp projects start from AFC drawings of the existing plant and progress new revisions through IFR / IFA / IFC / AFC. The reconciliation between existing AFC and new IFC scope is a common source of inter-discipline conflict.
- 06
Digital twin programmes rely on AFC drawings as the input data source. Pathnovo's P&ID extraction handles AFC drawings in PDF and scanned format to populate digital twin platforms.
How Pathnovo Handles It
Pathnovo's MDR automation product auto-generates and maintains the Master Document Register across FEED, detailed engineering, procurement, and construction with IFR / IFA / IFC / AFC lifecycle tracking. Pathnovo's P&ID extraction product handles deliverables at every status: IFR / IFA documents for engineering review, IFC documents for construction reference, and AFC documents for brownfield digitisation. Combined output supports CFIHOS-compliant handover and digital twin population. See the engineering handover pillar for the broader EPC handover workflow.
Frequently Asked Questions
What do IFR, IFA, IFC, AFC stand for?
IFR is Issued For Review (inter-discipline review). IFA is Issued For Approval (client approval). IFC is Issued For Construction (construction-ready release). AFC is As-Built For Construction (final installed configuration). The four status codes are the standard document lifecycle markers in EPC engineering deliverables.
What is the difference between IFR and IFA?
IFR (Issued For Review) is internal review by other engineering disciplines within the EPC contractor. IFA (Issued For Approval) is formal release to the client for approval. The deliverable typically goes through IFR cycles first, incorporates IDC comments, then releases as IFA for client review. IFA cycles often run 2-4 rounds before client approval.
What is IFC drawing status?
IFC (Issued For Construction) is the construction-ready release of an engineering deliverable. After client approval (IFA close-out) and final IDC verification, the deliverable is released as IFC. The construction contractor uses IFC drawings as the basis for fabrication, erection, and commissioning. Mid-construction revisions are issued as further IFC revisions.
What does AFC mean in engineering?
AFC (As-Built For Construction) is the final document status reflecting the actual installed configuration after construction. The construction contractor records field changes and the EPC contractor reconciles these into AFC drawings. AFC represents the true plant configuration and becomes the engineering reference for plant operations and modifications.
How long does the IFR-to-AFC lifecycle take?
P&IDs typically go through IFR, IFA (multi-round), IFC, and AFC stages over 18-36 months on a greenfield project. Smaller deliverables (instrument loop diagrams, electrical schematics) complete the lifecycle in 6-12 months. AFC reconciliation happens after mechanical completion and may extend 6-12 months into operations.
Why is AFC important for digital twin?
AFC drawings represent the true plant configuration after construction. Digital twin programmes rely on AFC drawings as the input data source. Pathnovo's P&ID extraction product handles AFC drawings in PDF and scanned format to populate digital twin platforms including AVEVA AIM, Bentley iTwin, Hexagon SDx2, and Cognite.
What is the role of MDR in tracking status?
The Master Document Register (MDR) tracks document revision history including IFR / IFA / IFC / AFC status across the project lifecycle. Pathnovo's MDR automation product auto-generates and maintains the MDR with full lifecycle tracking, CFIHOS-compliant transmittal feed, and revision audit trail.
Related Pages
MDR Automation
Master Document Register with IFR / IFA / IFC / AFC lifecycle tracking.
P&ID Data Extraction
Extract structured data from IFR / IFA / IFC / AFC P&IDs.
Engineering Handover Pillar
CFIHOS-compliant EPC handover from AFC deliverables.
Tag-Document Register
Tag-to-document mapping across IFR / IFA / IFC / AFC revisions.
P&ID Standard Reference
P&ID deliverable lifecycle across IFR / IFA / IFC / AFC.
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