There is an increasing request for web-based software systems, some of them to be used very intensive. The customers ask not only for fast design and implementation, but also for a high quality product. Considering reliability as an important quality attribute, this paper describes the current state of the art in designing, implementing, and testing web-based applications. An important attention is given to web-based software vulnerabilities and

Component-based software development facilitates software reuse and promotes quality and productivity. Combining agile approach with some component-based methodology improves the software quality. This paper describes the characteristics and benefits of using agile software development methodologies, mainly the adaptive software development approach mixed with COMO-DfT (the software reuse methodology for in-house software component design and development

In this paper the optimal software reliability allocation problem is studied when complex architectures are used and various constraints applied. Firstly, the basic reliability model in the case of component-based development methodology and the classical optimization approach are described. In the next sections the intuitionistic fuzzy numbers and the intuitionistic fuzzy optimization are considered. New formulas and interpretations will be given

Quality evaluation of learning objects asks for subjective approaches in a multi-criteria framework. This paper describes the usage of intuitionistic fuzzy sets for modelling the degree of acceptance/rejection of learning objects according to a set of criteria and proposes some methods for the best learning object identification. Experimental results are reported for items belonging to the computer science field evaluated both by students and teaching