The document discusses an incremental housing scheme in Pakistan that aims to provide affordable housing and services to low-income communities. Some key points: 1. The scheme started in 1986 in Orangi Town, Karachi and has since expanded to other parts of Pakistan. 2. It involves community organizations and allows residents to incrementally build housing units and connect to water, sewer and other infrastructure as they can afford it. 3. This flexible approach has proven successful as it is affordable and sustainable in the long run with community support.