This study highlights factors that influence the sustainability of international co-operation programmes in higher education, specifically of those programmes that deal with inter-institutional collaborations. In the first chapter of this book, the factors that influence the chances for sustainability of programme and project results are discussed and analysed based on the experiences of various international co-operative programmes. The second chapter discusses the conditions for sustainability of inter-institutional co-operation programmes from various angles. The findings and conclusions are brought together in a summary of the requirements for sustainability and the necessary action expected from the partners at the various levels of co-operation.