This document discusses zero-based channel design. It defines a zero-based channel as one that meets target market demands for service output at minimum cost. It emphasizes understanding target markets, buyer behavior, and end user demands. The document also discusses channel levels between producers and consumers, from zero levels (direct sales) to multiple intermediary levels. It defines channel gaps as aspects of the distribution channel that prevent it from being optimized, such as high costs, coordination problems, or a mismatch between supplied and demanded service outputs. The goal is to identify and avoid gaps to maximize profitability and customer satisfaction.