These open-source MMM tools solve different measurement problems, from budget optimization to forecasting and preprocessing.

Julie Young is an experienced financial writer and editor. She specializes in financial analysis in capital planning and investment management. Thomas J. Brock is a CFA and CPA with more than 20 years ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Andy Smith is a Certified Financial Planner (CFP®), licensed realtor and educator with over ...