Cassava and yams are important food security crops in much of sub-Saharan Africa and also in Asia because their presence in the cropping system increases the resilience of farmers in the face of climate change, drought and fluctuations in the price of durable commodities. Post-harvest losses of cassava and yams are significant and come in three forms; physical losses, economic losses and from the biowastes. This project aims to reduce these three types of post-harvest losses in order to enhance the role that these crops play in food and income security for small-holder households. Cassava and yam are amongst the most improtant root crops, but differ in terms of their sale as fresh produce, the improtance of storage and the scale and importance of processing. This project will use these differences to develop a comprehensive aproach to reducing post-harvest losses with lessions that could be applied to other perishable commodities, delivering ouputs that will benefit millions of producing and consuming households across the developing world. A key approach to this project is to address both technical and socio-economic aspects of losses and waste management. In terms of the comprehensiveness of the approach, technologies and slystems will be developed, validated, demonstrated and more widely disseminated that focus benefits on small-holder households whilst offering increased income earning opportunities through the development of small to medium scale enterprises and provide an example of a linkage to a large scale user of cassava.