Prepare a supplier negotiation

Help me prepare a supplier negotiation.
Inputs: supplier situation; goals; alternatives.

1. Map interests, constraints and tradable terms.
2. compare total costs and risks from evidence.
3. prepare questions, concession order and limits.

Deliver: Situation summary, Benchmarks to check, BATNA and walk-away, Leverage, Asks and trades, Opening and scripts, Objections.
Clarify critical gaps, separate facts from assumptions, and do not invent data, citations or completed actions.

My material: [fill in here]

Before you start

Provide supplier situation; goals; alternatives.