Is my configuration any good: checking usability in an interactive sensor-based activity monitor

Calder, M. , Gray, P. and Unsworth, C. (2015) Is my configuration any good: checking usability in an interactive sensor-based activity monitor. Innovations in Systems and Software Engineering, (doi:10.1007/s11334-013-0203-1)

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Abstract

We investigate formal analysis of two aspects of usability in a deployed interactive, configurable and context-aware system: an event-driven, sensor-based homecare activity monitor system. The system was not designed from formal requirements or specification: we model the system as it is in the context of an agile development process. Our aim was to determine if formal modelling and analysis can contribute to improving usability, and if so, which style of modelling is most suitable. The purpose of the analysis is to inform configurers about how to interact with the system, so the system is more usable for participants, and to guide future developments. We consider redundancies in configuration rules defined by carers and participants and the interaction modality of the output messages.Two approaches to modelling are considered: a deep embedding in which devices, sensors and rules are represented explicitly by data structures in the modelling language and non-determinism is employed to model all possible device and sensor states, and a shallow embedding in which the rules and device and sensor states are represented directly in propositional logic. The former requires a conventional machine and a model-checker for analysis, whereas the latter is implemented using a SAT solver directly on the activity monitor hardware. We draw conclusions about the role of formal models and reasoning in deployed systems and the need for clear semantics and ontologies for interaction modalities.

Item Type:Articles
Status:Published
Refereed:No
Glasgow Author(s) Enlighten ID:Unsworth, Dr Chris and Calder, Professor Muffy and Gray, Mr Philip
Authors: Calder, M., Gray, P., and Unsworth, C.
College/School:College of Science and Engineering > School of Computing Science
Journal Name:Innovations in Systems and Software Engineering
Publisher:Springer
ISSN:1614-5046
ISSN (Online):1614-5054
Published Online:29 March 2013
Copyright Holders:Copyright © 2013 Springer
First Published:First published in Innovations in Systems and Software Engineering
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
443471Verifying interoperability requirements in Pervasive Systems (VPS)Muffy CalderEngineering & Physical Sciences Research Council (EPSRC)EP/F033206/1COM - COMPUTING SCIENCE