Do you recognise this dialog?
Senior Executive (SE): “In this plan you’re showing me, you say it will be ready by December?”
Project Manager (PM): “Well that’s the best estimate we have now based on what we know.”
SE: “I want it by end of June.”
PM: “Er, OK. Er but the team don’t believe it can be done.”
SE: “Take your black hat off. It’s your job to make it happen.”