I suggest you communicate the same message to your client. You can prepare a chart outlining what is the possible profit, what is the worst that could happen (loss) and how much money will be lost if your deal is lost to endless meetings. This should make the decision quicker.
A magic catch phrase is also "If we don't do it now, [the competitor] will do it!".
Greetings :)
Greetings Maciek Kokot
RSS