Decision Point: "Is PO Amendment Approved?"
Trigger: After PO issuance, when quantity, price, delivery date, specifications, or scope need to change. Amendment types: QTY_INCREASE, QTY_DECREASE, PRICE_CHANGE, DATE_EXTENSION, SCOPE_CHANGE, SPEC_CHANGE, SHIP_TO_CHANGE, TERMS_CHANGE, CANCELLATION.
Amendment vs. New PO: Amendment (same PO number) applies when: price change <15%, quantity change <25%, delivery date shift <30 days. If changes exceed these thresholds, a new PO may be required with fresh approval. All amendments require vendor consent — vendor can ACCEPT, ACCEPT_WITH_CONDITIONS, COUNTER_PROPOSE, or REJECT.
YES Path
Amendment approved → Vendor notified → Vendor accepts → PO updated with new revision number → Downstream GRN/Invoice updated
NO Path
Enter PO Amendment Resolution Workflow
PO Amendment Resolution Workflow
Step 1: Classify Amendment Type
| Amendment Type | Approval Level | Vendor Consent |
| Quantity (<10%) | Procurement Manager | Required |
| Quantity (10-25%) | Procurement Head | Required + Negotiation |
| Price Change | Finance + Procurement Head | Required |
| Date Extension (<30d) | Project Manager | Acknowledgment |
| Scope / Spec Change | Engineering + Finance + Director | Full Negotiation |
| Cancellation | VP / Director | Settlement Required |
Step 2: Impact Analysis
- Budget impact: Calculate cost difference between original and amended PO
- Schedule impact: Effect on project timeline and milestones
- Inventory impact: Effect on material availability and safety stock
- Downstream impact: Check if GRN, ASN, or invoices already exist against this PO
- Amendable quantity = PO qty - received qty - in-transit qty
Step 3: Vendor Response
- Vendor receives amendment request via portal with full change details
- Vendor has 48h to respond (configurable per amendment type)
- If ACCEPT → Amendment executed, PO updated
- If COUNTER_PROPOSE → Negotiation round opens; vendor suggests alternate terms
- If REJECT → Escalate to Procurement Head for alternative sourcing
- If NO_RESPONSE within 48h → Auto-reminder at 24h, escalation at 48h
Step 4: Escalation
- If amendment rejected by approver → Revise justification or cancel amendment request
- If vendor rejects → Source alternative vendor (new PO) or negotiate further
- If partial receipts already made → Cannot reduce qty below received qty
- All amendment history maintained in
po_amendment_audit with before/after snapshots
Key Metrics: Amendment approval rate: 85% | Average turnaround: 2-3 days | Vendor acceptance rate: 92% | Amendment frequency: ~8% of POs