Proceedings of the 13th International Conference on Enterprise Information Systems Acronym: ICEIS 2011 Event held on: June 8-11, 2011, in Beijing, China Editors: Runtong Zhang 1 , José Cordeiro 2 , Xuewei Li 1 , Zhenji Zhang 3 and Juliang Zhang 1 Affiliations: 1 Beijing Jiaotong University, China , 2 Polytechnic Institute of Setúbal / INSTICC, Portugal , 3 School of Economics and Management, Beijing Jiaotong University, China Vol. 1 - 978-989-8425-54-6 Vol. 2 - 978-989-8425-53-9 Vol. 3 - 978-989-8425-56-0 Vol. 4 - 978-989-8425-55-3