Lappeenrannan teknillinen yliopisto Lappeenranta University of Technology Jukka Hallikas MANAGING RISK IN SUPPLIER NETWORKS: CASE STUDIES IN INTER-FIRM COLLABORATION Acta Universitatis Lappeenrantaensis 173 Thesis for the degree of Doctor of Science (Technology) to be presented with due permission for public examination and criticism in the Auditorium of the Student Union House at Lappeenranta University of Technology, Lappeenranta, Finland on the 2 nd of December, 2003, at noon.