The document discusses challenges related to sanitation in India and how human-centered design was applied to help address these challenges. It summarizes a project called Project Sammaan that designed and planned to build improved sanitation facilities in Indian cities to benefit over 60,000 people. The human-centered design process involved in-depth research through observations and conversations to develop insights into sanitation behaviors and needs. From these insights, scenarios and innovations were developed for facility design, communications, operations and business models. The project faced implementation challenges but its research contributed to policy changes and guidelines.