An investment center is a subunit of a company that is responsible for generating revenue, controlling costs, and investing in assets. It is charged with earning income consistent with the amount of assets invested. Most company divisions can be considered profit or investment centers. Performance is often evaluated using return on investment (ROI), which considers income earned and capital invested. ROI can be broken down into profit margin and investment turnover. Residual income and economic value added are also used, as they consider the minimum acceptable return and invested capital.