Istituto di Scienza e Tecnologie dell'Informazione     
Massink M., Latella D., Ter Beek M. H., Harrison M. D., Loreti M. A fluid flow approach to usability analysis of multi-user systems. In: HCSE'08, EIS'08, TAMODIA'08 - Engineering Interactive Systems. Second Conference on Human-Centered Software Engineering, HCSE 2008, and 7th International Workshop on Task Models and Diagrams, TAMODIA 2008 2nd Conference on Human-Centered Software Engineering, part of Engineering Interactive Systems 2008 (Pisa, Italy, 25-26 September 2008). Proceedings, pp. 166 - 180. P. Forbrig and F. Paterṇ (eds.). (Lecture Notes in Computer Science, vol. 5247). Springer, 2008.
The analysis of usability aspects of multi-user systems, such as cooperative work systems and pervasive systems, pose particular problems because group behavior of their users may have considerable impact on usability. Model-based analysis of such features leads to state-space explosion because of the sheer number of entities to be modeled when automatic techniques such as model checking are used. In this paper we explore the use of a recently proposed scalable model-based technique based on solving sets of Ordinary Differential Equations (ODEs). Starting from a formal model specified using the Performance Evaluation Process Algebra (PEPA), we show how different groupware usage patterns may be modeled and analyzed using this approach. We illustrate how the approach can explore different design options and their impact on group behavior by comparing file access policies in the context of a groupware application.
URL: http://www.springerlink.com/content/r12k703363p5/?p=ef4da533ba7745638beaddc005f5f0a7&pi=60
DOI: http://dx.doi.org/10.1007/978-3-540-85992-5_15
Subject Formal Methods
Model-based usability analysis
Performance Evaluation Process Algebra
Ordinary Differential Equations
Groupware Systems
D.2.4 Software/Program Verification. Formal methods
G.1.7 Ordinary Differential Equations
B.2.2 Performance Analysis and Design Aids. Verification

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