In the paper we discuss evolution of the dependability and dependable systems concept. We analyzed issues of ensuring dependability of systems that are built using the principles of service-oriented architecture and web services technologies. One of the key issue of building dependable service-oriented systems is an uncertainty of non-functional components they use, i.e. webservices. Existing works in the area of developing service-oriented systems have been analyzed and actual directions of the further researches in this area have been drawn.
dependability, service-oriented systems, web-services