Marketing channels, also known as distribution channels, are a set of interdependent organizations involved in making a product available to consumers. They include manufacturers, wholesalers, retailers, and other intermediaries. There are different types of intermediaries and levels within marketing channels, from direct channels with no intermediaries to channels with multiple levels of intermediaries. Properly designing marketing channels requires analyzing customer needs, setting objectives, identifying alternatives, and evaluating alternatives based on economic, control, and adaptive criteria. Managing channels also requires selecting, motivating, and evaluating channel members over time.