Participatory technology development (PTD) is an approach to learning and innovation that is used in international development as part of projects and programmes relating to sustainable agriculture. The approach involves collaboration between researchers and farmers in the analysis of agricultural problems and testing of alternative farming practices.
The origins of Participatory Technology Development can be found in a number of approaches, concepts and techniques that became popular in the 1970s and 1980s:
One of the leading authorities on this process is the Centre for learning on sustainable agriculture - ILEIA based in the Netherlands. ILEIA has described PTD as "a process between local communities and outside facilitators which involves:
PTD facilitators are usually researchers, sometimes consisting of a team that includes both biological and social scientists. While PTD is closely linked to research, it often crosses the boundary into agricultural extension because it involves learning activities with farmers.