Schedule a time and place to meet with the people who need to agree on your proposal. Get their commitment to attend.
Set an agenda for the meeting that covers presentation and discussion of the problem situation, analysis by the group, and closure with a decision.
Discuss the details of the situation, and the consequences of taking no action.
Present a summary of your proposed response, emphasizing its main benefits. Continue discussing the details and show how your idea directly addresses the needs.
Invite questions, criticism, concerns, and objections. Acknowledge them and respond to them using the information you prepared. Encourage people to propose modifications to your proposal that might improve it, and adopt any beneficial suggestions. ...