The fourth volume of the Report of the Committee on Doubling Farmers’ Income (DFI) examines the status and reforms needed in the agricultural marketing system. A clear differentiation is proposed between the system that facilitates marketing of agricultural produce and the modes to connect the produce to markets. The latter is a physical function, and is discussed in the first part of this volume. The former is the environment and the logic behind that function, to guide and enable the ways that agricultural produce can realise optimal value.