Fuzzy Mashup Quality Requirements Specification for Web Users

Up to now, specification and evaluation of quality requirements is neglected in current approaches for developing composite Web mashups. Important, yet missing concepts are quality requirements models and tool support for user-centered requirements specification. Therefore, it is cumbersome and unsatisfactorily for Web users, to express quality requirements on mash up components and select suitable ones for their self-made applications. In this paper, we present a novel approach of modelling quality requirements for composite Web mashups using colloquial terms, which augment a tailored property model. To this end, we introduce a quality requirements metamodel for Web mashups and show, how the mash up platform can meet the target group´s skills and expectations by specifying quality requirements with fuzzy expressions. A user study underlines the benefit of employed modelling concepts and the implemented requirements composer, when performing common composition tasks.