This book constitutes the refereed research proceeding of the 13th European Software Process Improvement Conference, EuroSPI 2006, held in Joensuu, Finland in October 2006. The 18 revised full papers presented were carefully reviewed and selected from 62 submissions. The papers are organized in topical sections on SPI (Software Process Improvement) processes, SPI and risk management, measurement, process modelling, human factors, and implementation of SPI.