You are the manager at a factory that makes computer chips. You depend on a silicon supplier to deliver the supplies on time. You are happy with their costs but sometimes they are late when they deliver the material. You have tried other suppliers but you were unhappy with the quality of their product. You would rather pay a higher price than switched to the other suppliers. You usually pay for the materials after they are delivered. Typically, you pay $25/computer chip which is the market average price.

Which negotiation technique or method is useful in this case.