Most angels and investors are quite comfortable using metrics to measure return on investment, or rebalance their portfolios. By the same token, angels need to teach the CEOs of their portfolio companies to use metrics to measure whether their companies are achieving their growth goals. Entrepreneurs seldom ask their angels which metrics to use or how often to measure. They would rather work on the product or meet with customers than take the time to measure and report progress. But measuring is one of the disciplines CEOs need to develop as they grow their companies.