Representation and Utilization of Non-Functional Requirements for Information System Design (1991) [9 citations — 5 self]
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@INPROCEEDINGS{Chung91representationand,author = {Lawrence Chung},
title = {Representation and Utilization of Non-Functional Requirements for Information System Design},
booktitle = {In},
year = {1991},
pages = {5--30},
publisher = {Springer-Verlag}
}
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Abstract:
Abstract The complexity and usefulness of large information systems are determined partly by their functionality, i.e., what they do, and partly by global constraints on their accuracy, security, cost, user-friendliness, performance, and the like. Even with the growing interest in developing higher-level models and design paradigms, current technology is inadequate both representationally for expressing such global constraints as formal non-functional requirements and methodologically for utilizing them in generating designs. We propose both a representational and methodological framework for non-functional requirements, focusing on accuracy requirements. With the premise that accuracy is an inherent semantic attribute of information, we take a first step towards establishing a representational basis for accuracy. To guide the design process and justify design decisions, we propose a goal-oriented methodology. In the methodology, accuracy requirements are treated as (potentially conflicting) goals, for which two types of methods are presented: one for decomposing the goals in terms of affected design components, and the other for contributing, either positively or negatively, to goal satisfaction. Nonfunctional requirements are further investigated for their cooperation and conflicts, which enables the assessment of the quality of overall design. A detailed illustration demonstrates how the framework aids a designer's decision-making process by recommending the types of consultation needed with users in the intended application domain. 1
