J. C. Penney, a large retail company with many stores, has an inventory turnover of 4.1 times. Dell Computer Corporation, an Internet mail-order company, has an inventory turnover of about 100.0. Dell achieves its high turnover through supply-chain management in a just-in-time operating environment. Why is inventory turnover important to companies like J. C. Penney and Dell? Why are comparisons among companies important? Are J. C. Penney and Dell a good match for comparison? Describe supply-chain management and a just-in-time operating environment. Why are they important to achieving a favorable inventory turnover?