The provision of network Quality-of-Service (network QoS) is a major challenge in the development of future communication systems. Before designing and implementing these systems, the network QoS requirements are to be specified. Existing approaches to the specification of network QoS requirements are mainly focused on specific domains or individual system layers. In this paper, we present a ho...

There will be quality requirements posed on network transfers of multimedia information. They stem from inherent timing requirements of temporally sampled signals, and from tolerance levels given by the use of the transfers. Loss, errors and delay above these levels may impede the information exchange between users and, if aggravated, it may eventually lead them to reject the service. This pape...

Requirements engineering (RE) is concerned with the identification of stakeholders' needs concerning a future system, the specification of services and constraints that satisfy these needs, and the assignment of the resulting requirements to agents such as humans, hardware devices, and software components. Functional requirements describe what functions must be provided to satisfy the stakehold...

IT industry needs reliable data about quality requirements to evaluate adequately systems and their architecture. The task is not easy due to nature of these requirements. In fact they are vague, difficult to define and often conflicting with other requirements. Today’s quality requirements management methods are dealing either with one quality requirement aspect (ex: FDAF framework for securit...

We present a proposal of a quality model for natural language requirements that concentrates on linguistic properties of requirements documents. We deploy the quality framework of Krogstie et al. as a superor-dinate rationale supporting the design of a quality model. At the same time, the quality model is intended to cover and classify the corpus of linguistic techniques proposed in the literat...

Two of the common features of business and the web are diversity and dynamism. Diversity results in users having different preferences for the quality requirements of a system. Diversity also makes possible alternative implementations for functional requirements, called variants, each of them providing different quality. The quality provided by the system may vary due to different variant compo...

There are several factors that impact overall distributed system performance, including processor and memory utilization, precedence constraints, network communication traffic, and peripheral access. This paper describes an approach to calculate and prioritize the various quality requirements of a specific distributed system to automate construction of that system’s architectural structure. Thi...