Plan a transition from one supplier to another

Help me plan a switch from an outgoing supplier to a new one without disrupting supply. Items moving: [PARTS OR SERVICES, ANNUAL VOLUME, NUMBER OF SKUS] Outgoing supplier and relationship: [CONTRACT END OR NOTICE TERMS, COOPERATIVE OR NOT, TOOLING OR IP THEY HOLD] New supplier status: [QUOTED / SAMPLES APPROVED / QUALIFIED / NOT YET] Qualification needs: [FIRST ARTICLE, PPAP OR EQUIVALENT, CUSTOMER APPROVAL, REGULATORY CHANGE NOTIFICATION] Lead times: [NEW SUPPLIER RAMP-UP TIME, TRANSIT TIME] Current inventory and demand: [WEEKS OF COVER, FORECAST] Target cutover date: [DATE] Plan should cover: 1. Qualification steps with realistic durations and the approvals needed (including any customer sign-off). 2. A bridge or last-time buy from the outgoing supplier sized to cover qualification plus a buffer for failure; show the calculation. 3. Tooling, drawings, specs, and test fixtures transfer, and who owns them per the contract. 4. A ramp schedule with parallel supply where possible. 5. System changes: approved vendor list, item master, sourcing rules, open PO cancellation. 6. How to notify the outgoing supplier (timing matters if they could stop shipping). 7. Go/no-go criteria for cutover and a fallback plan. Use my dates and quantities; mark assumptions [ASSUMPTION]. Contract exit terms should be confirmed with legal. Return: a timeline table (Phase | Tasks | Owner | Start | End | Dependency), the bridge inventory calculation, the top risks with mitigations, and a draft notice to the outgoing supplier.