There's an old management axiom: You can't manage what you don't measure. Yet many organizations do a very poor job (or no job at all) of measuring the business value of their IT investments. By employing a consistent methodology that both business users and IT are held accountable for and that measures projected business value, your organization can significantly improve your IT investment returns. Four existing methodologies can be adopted as is or customized to suit specific needs. Organizations should pick one, institutionalize it as part of an overall governance framework, and embed it in IT portfolio management.