Building upon a long tradition of scientifi c conferences dealing with problems of

reliability in technical systems, in 2006 Department of Computer Engineering at

Wroclaw University of Technology established DepCoS-RELCOMEX series of events

in order to promote a comprehensive approach to evaluation of system performability

which is now commonly called dependability.

Contemporary complex systems integrate variety of technical, information, soft ware

and human (users, administrators and management) resources. Their complexity

comes not only from involved technical and organizational structures but mainly from

complexity of information processes that must be implemented in specific operational

environment (data processing, monitoring, management, etc.). In such a case traditional

methods of reliability evaluation focused mainly on technical levels are insufficient and

more innovative, multidisciplinary methods of dependability analysis must be applied.

Selection of submissions for these proceedings exemplify diversity of topics that must

be included in such analyses: tools, methodologies and standards for modelling,

design and simulation of the systems, security and confidentiality in information

processing, specific issues of heterogeneous, today often wireless, computer networks,

or management of transportation networks. In addition, this edition of the conference

hosted the 5th CrISS-DESSERT Workshop devoted to the problems of security and

safety in critical information systems.