Transcript Slide 0
Process Mining Software Repositories Wouter Poncin Alexander Serebrenik Mark van den Brand Versioning system Mail archive Bug repository Wiki Log FRamework for Analysing Software Process mining Sept. 23, 2010 Repositories • Analysis mining and Alice sends a bill visualization ofpreprocessing the • and analysis Separation of analysis to Model the owner of tools software • visualization the vehicle VHReuse of existing techniques development 12-ST. Flexibility … Twitter / Department of Mathematics and Computer Science 20-7-2015 PAGE 1 Business processes vs. Software processes Business processes Software processes One data source “Natural case”: • association of different events • claim id, person id, vehicle id Explicit events Multiple data sources Many different options • files, developers, topics… Unique data representation Different representations in different data sources / Department of Mathematics and Computer Science Implicit events • is the mail relevant to the bug report? 20-7-2015 PAGE 2 How do we apply FRASR? S.E. Question Define data sources FRASR Define case mapping / Department of Mathematics and Computer Science ProM Attach event bindings Calculate developer matching Answer Export 20-7-2015 PAGE 3 Case study 1: Developer roles • Multiple sources + process mining (analysis) • S.E. question • Classify developers according to their roles • Classification of Nakakoji et al. IWPSE 2002: 8 roles • Core member involved for a relatively long period and made significant contributions to the development and evolution of the system − 3 years (project run: 8 years) − Version control: file added, file modified − More version control events than average S.E. Question FRASR / Department of Mathematics and Computer Science ProM Answer 20-7-2015 PAGE 4 Case study 1: System under investigation • aMSN: instant messaging application • • • • • 38 million downloads, 20th most popular at SourceForge February 26, 2002 – July 9, 2010 7 bug repositories: 3137 bug reports 3 mail archives: 34947 messages Subversion: 12062 commits Define data sources S.E. Question Define case mapping FRASR / Department of Mathematics and Computer Science Attach event bindings ProM Calculate developer matching Export Answer 20-7-2015 PAGE 5 Case study 1: FRASR configuration • We are interested in developers case = developer • Each data source type requires specific extraction technique event-binding = type-specific • 1725 developers matching = heuristic Define data sources S.E. Question Define case mapping FRASR / Department of Mathematics and Computer Science Attach event bindings ProM Calculate developer matching Export Answer 20-7-2015 PAGE 6 Case study 1: Results Time Developers S.E. Question FRASR / Department of Mathematics and Computer Science ProM Answer 20-7-2015 PAGE 7 Case study 1: Results ProM Dotted Chart visualization Versioning: file modified, renamed or deleted Bug ticket created S.E. Question Versioning: file added Other bug events Mail FRASR / Department of Mathematics and Computer Science ProM Answer 20-7-2015 PAGE 8 Case study 1: Results Core developers (examples) Problem in the original classification Peripheral developers Bug reporter S.E. Question FRASR / Department of Mathematics and Computer Science ProM Answer 20-7-2015 PAGE 9 Case study 1: Classification Role Bug reporter • x #developers 1443 Bug fixer Peripheral developer Active developer 3 29 6 Core member Project leader Other 7 3 234 Total 1725 / Department of Mathematics and Computer Science Bugs are usually fixed by peripheral developers Only ticketcommented or mail-reply 20-7-2015 PAGE 10 Case study 2: Bug life cycle in Bugzilla Theory according to the Bugzilla Guide One source + process mining (mining) / Department of Mathematics and Computer Science S.E. question: Is Bugzilla used the way it is supposed to be? 20-7-2015 PAGE 11 Case study 2: Bug life cycle in Bugzilla Practice vs. Theory / Department of Mathematics and Computer Science Process model mined from GCC Bugzilla (42373 bugs) 20-7-2015 PAGE 12 Conclusions Process mining software repositories = separation of preprocessing and analysis flexibility and reuse of the existing techniques ? sourc es FRASR case events / Department of Mathematics and Computer Science ProM develo pers ! export 20-7-2015 PAGE 13