Development co-operation agencies have recognised that they need to work together in a better way, co-ordinating their work to prevent duplication and maximise synergies. Evaluation of development activities is following this general trend and as the form of co-operation is shifting towards budget support, sector-wide approaches, and multi-donor programming, evaluations of development co-operation are also moving towards more joint approaches. The DAC Network on Development Evaluation plays an active role in supporting this shift towards more collaborative work – by offering guidance, providing a platform to coordinate evaluation plans and facilitating joint work on development topics of wide interest.