Jane is planning for a forthcoming negotiation with a key supplier.

Jane is planning for a forthcoming negotiation with a key supplier. She has learned what are important to the supplier and what are important to her company from previous contracts between them. In order to avoid negotiation deadlocks, she has set up several concession plans. But Jane has little experience in dealing with suppliers and doesn't know when to trade these concessions. When is the best time in a negotiation to trade concessions?