Web conceptual models certainly represent a successful approach to the design of complex Web applications. Wrong uses of conceptual models may however introduce problems, which void the numerous advantages deriving from their exploitation in Web applications design. In this paper, we present a quality model for WebML, an XML-based Web conceptual model having a graphical notation. We also introd...

Misuse cases are like use cases, but with bad intent. They can be used when defining non-quality attributes. This paper describes the main concepts concerning misuse cases and shows ways to present them. A literature study is performed to find answers to research questions.

Scenario profiles are used increasingly often for the assessment of quality attributes during the architectural design of software systems. However, the definition of scenario profiles is subjective and no data is available on the effects of individuals on scenario profiles. In this paper we present the design, analysis and results of a controlled experiment on the effect of individuals on scen...

Variability is a key factor of most systems. While there are many works covering variability in functionality, there is a research gap regarding variability in software qualities. There is an obvious imbalance between the importance of variability in the context of quality attributes, and the intensity of research in this area. To improve this situation, the First International Workshop on VAri...

It is becoming more and more clear that architectural design is a crucial step in building complex software. Architectural design involves the first and most crucial design decisions to meet the expected quality attributes [1]. Dealing with concerns that influence important quality attributes asks for an architecture-centric approach. In this paper we propose architectural concerns as basic con...

This paper aims to develop an object-based total quality reference model for various perspectives of heterogeneous stakeholders, which is able to completely define the quality of a distance learning system. The proposed model is a multilayer framework that is stratified by an abstract model, quality categories, super quality classes, sub-super quality classes, and attributes. Through back-forwa...

Practical prover interfaces are sizeable pieces of software, whose construction and maintenance requires an extensive amount of effort and resources. This paper addresses the engineering aspects of such developments. Using non-functional properties as quality attributes for software, we discuss which properties are particularly relevant to prover interfaces and demonstrate, by the example of th...

Architects use a variety of techniques to evaluate designs to determine the degree to which a product produced from the architecture would possess the desired levels of specific quality attributes. Reasoning frameworks are used to guide architecture definition by predicting the extent to which a software architecture satisfies its quality requirements. There has been much research about such di...

We involved 30 customers of a company designing and producing microwave ovens. In a number of experiments these customers generated over 100 new ideas on functions, attributes and services related to microwave ovens. The 21 best ideas were identified by company specialists and these ideas were then evaluated by a large customer group using the theory of attractive quality in order to identify w...

A hedonic price function for wine is estimated using Swedish data, 1989-91. Implicit prices for quality attributes are determined not from a regression of variety price on a vector of quality attributes, but rather from a regression of quantity sold (adjusted for weeks of availability) on price and quality attributes. Such a ‘reduced form’ is justified by the assumption that prices and attribut...