Get your idea off the ground. You've got a great idea that will increase revenue or boost productivity--but how do you get the buy-in you need to make it happen? By building a business case that clearly shows your idea's value. That's not always easy: Maybe you're not sure what kind of data your stakeholders will trust. Or perhaps you're intimidated by number crunching. The HBR Guide to Building Your Business Case , written by project management expert...