Companies use a variety of definitions to measure the investments made in their divisions. Four common alternative definitions used in the construction of accounting-based performance measures are as follows:
Companies that use ROI or RI generally define investment as the total assets available. When a firm directs a subunit manager to carry extra or idle assets, the total assets employed can be more informative than total assets available. Companies that use EVA define investment as the total assets employed minus current liabilities. The rationale for using this definition is that it captures total investment as measured by the sum of working capital (current assets minus current liabilities) and the long-term assets employed in the subunit. Managers are responsible for generating an adequate return on both components.