ECO.3:4.1 - Recover the relevant parts of the separate plans
Identify what each prospective party is trying to accomplish, what contribution is missing, and what it can actually offer. Ask for the part that can change the proposed exchange: a delivery window, usable specification, spare capacity, right of access, complementary skill or limit on exposure.
Keep understanding and agreement separate. A party may understand a proposal and rationally prefer its current plan. Avoid treating silence as a commitment or declared interest as available resources.