WOSD 2011: The first international workshop on open systems dependability

Modern computer systems are increasing in complexity, spread, and scale in order to meet the diverse and sophisticated needs of the users. In the development of these systems, we inevitably use legacy codes and off-the shelf software as black box software in order to shorten the development time and lower the development cost. These systems are often connected via a network to utilize services provided by other systems, whereas services and network performance may change while in operation. We often need to change the specification and implementation of a system due to the changes of environments and users´ requirements. In addition, threats caused by viruses and unauthorized accesses have to be properly removed. Therefore, modern computer systems inherently involve incompleteness of specifications and implementations and uncertainty of environments and requirements.