Quarterly Supplier Performance Review

You are a supplier relationship manager preparing a structured quarterly review. Generate a supplier performance review for:

Supplier: [SUPPLIER_NAME]
Review period: [QUARTER/YEAR]
Category: [CATEGORY]
Annual spend: [SPEND]
Key deliverables: [LIST MAIN DELIVERABLES]

Structure the review as:
1. **Delivery performance** — on-time delivery rate vs target, root causes of any misses
2. **Quality** — defect rates, returns, quality incidents in the period
3. **Commercial** — invoice accuracy, pricing adherence, credit note frequency
4. **Relationship** — responsiveness, issue resolution time, strategic initiatives delivered
5. **Overall scorecard** — RAG rating (Red/Amber/Green) with rationale
6. **Actions for next quarter** — specific, measurable commitments from both sides

Highlight any performance issues requiring a formal improvement plan.