You need to be very cautious about the time during your sustainable business negotiation.
You should have the time plan for the negotiation. The time plan needs to have visibility to both the parties too. It will become easier to follow up with the planned timeline for both the parties being on the same page.
Keep in mind that, you should always need to evaluate your time plan status with reality.
You can use this easy to use “Negotiation Time Planner” to plan and track the time.