This module further develops the role of purchasing as a logistic sub-sector. The participant learns to differentiate between internal and external customers, and learns about the financial health of companies. He or she gains further knowledge regarding customer satisfaction. In the second section, the module examines and contrasts public and private purchasing, centralized and decentralized purchasing, the purchasing cycle, and technology. Lastly, the participant learns about some of the challenges in the purchasing department, as well as the functions and capabilities of the purchase order.