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MSR 2018
Mon 28 - Tue 29 May 2018 Gothenburg, Sweden
co-located with * ICSE 2018 *

Several authors have quantified the modularity of software systems in terms of coupling and cohesion metrics. Most of these approaches focus on functional and procedural dependencies in the system. Although highly relevant at the design phase, these static dependencies alone do not account for how a software product evolves over time. Instead, this is also dictated by logical and hidden dependencies between system files. To a large extent, the co-change (co-commit) relation captures these different types of dependencies. In this paper, we define two measures of co-change-modularity of a software product based on a weighted design structure matrix (DSM). The first metric, called the weighted propagation cost, uses matrix exponential to measure how changes to one system file potentially affect the whole product. The second metric, called the weighted clustering cost, uses the output of the first metric to measure the partitionability of the system based on the co-change relation. In addition, we provide a visual representation of how the co-change structure of a system evolves over time. We discuss the theoretical foundation of our work and highlight its advantages over existing methodologies. We apply our approach to GNU Octave and show the findings to be consistent with the available literature on the evolution of Octave. Our analysis is extensible and applicable to a range of scenarios including open source systems.

Tue 29 May

msr-2018-papers
09:00 - 10:30: Technical Papers - 2008 Most Influential Paper Award and Evolution and Changes at E4 room
Chair(s): Cor-Paul BezemerQueen's University, Kingston, Ontario
msr-2018-papers09:00 - 09:59
Talk
Abram HindleUniversity of Alberta, Daniel M. German, Ric Holt
Pre-print
msr-2018-papers09:59 - 10:16
Full-paper
Sebastian Baltes University of Trier, Lorik Dumani , Christoph TreudeThe University of Adelaide, Stephan DiehlComputer Science, University Trier, Germany
DOI Pre-print Media Attached
msr-2018-papers10:16 - 10:23
Short-paper
Link to publication DOI Pre-print
msr-2018-papers10:23 - 10:30
Short-paper
Pre-print