This book constitutes the joint post-proceedings and proceedings of the 10th and 11th International Symposium on Software Configuration Management, SCM 2001 and SCM 2003, held in Toronto, Canada in May 2001 and in Portland, OR, USA in May 2003. The 20 revised full papers presented were carefully reviewed and selected from a total of 58 submissions. The papers are organized in topical sections on version models, architecture, concurrency and distribution, component-based systems, education, and new applications.