Idea
Commercial
Include indicative agenda
In the context of this RfP, it is clear that many specialists will have to be involved in order to provide you with a sound answer. I would advise, in this dialogue, to give an expected planning for the different steps, for instance: questions = 2 weeks after RfP is released; Answers = 1 week later; final answer from suppliers = 2 weeks after.
Those information would be imho quite valuable and give a good understanding of mutual understanding of the project.
Thank you