This document discusses corporate strategy and the quest for parenting advantage. It analyzes different types of fit between a corporate parent and its businesses using a matrix. A good fit can create value, while a bad fit can destroy value. The document examines where a parent can positively or negatively influence a business based on the business' critical success factors and potential opportunities for the parent to add value. It provides examples of different fit categories like "heartland businesses," "ballast businesses," "alien territory businesses," and "value-trap businesses." The analysis helps assess where changes could improve the fit between a parent and its businesses.