The document discusses the Maziwa Zaidi R4D Program in Tanzania, which aims to improve agricultural research for development (AR4D) through a value chain approach. The program addresses the entire dairy value chain from production to consumption. It works in partnership with development actors and integrates research, public, and private sector organizations. The program takes a solution-driven approach and aims to generate evidence, design interventions, and facilitate their scaling up nationally. It selects pilot sites targeting poor and marginalized cattle keepers to prove the concept and facilitate more investment in the Tanzanian dairy sector.