The Paris Declaration on Aid Effectiveness recognised that the multitude of donor approaches to providing and managing aid could result in unnecessary duplication of efforts and a greater burden on partner countries that have to deal with a wide range of policies and procedures. The Accra Agenda for Action went further by committing donors and developing countries to work together to reduce aid fragmentation both within and across developing countries. Have donors made progress in working with each other? To what extent have the commitments on the use of common arrangements, the co-ordination of technical co-operation, donor missions and analytic works set out in the Paris Declaration and Accra Agenda for Action been implemented? Have donors made efforts to reduce the fragmentation of aid, including through the adoption of an appropriate division of labour at both the country and global levels? This chapter offers answers to these questions, drawing on the results of the 2011 Survey on Monitoring the Paris Declaration.