Building upon a long tradition of scientifi c conferences dealing with problems ofreliability in technical systems, in 2006 Department of Computer Engineering atWrocław University of Technology established DepCoS-RELCOMEX series of eventsin order to promote a comprehensive approach to evaluation of system performabilitywhich is now commonly called dependability.Contemporary complex systems integrate variety of technical, information, soft wareand human (users, administrators and management) resources. Their complexitycomes not only from involved technical and organizational structures but mainly fromcomplexity of information processes that must be implemented in specific operationalenvironment (data processing, monitoring, management, etc.). In such a case traditionalmethods of reliability evaluation focused mainly on technical levels are insufficient andmore innovative, multidisciplinary methods of dependability analysis must be applied.Selection of submissions for these proceedings exemplify diversity of topics that mustbe included in such analyses: tools, methodologies and standards for modelling,design and simulation of the systems, security and confidentiality in informationprocessing, specific issues of heterogeneous, today often wireless, computer networks,or management of transportation networks. In addition, this edition of the conferencehosted the 5th CrISS-DESSERT Workshop devoted to the problems of security andsafety in critical information systems.weiterlesen