Beyond The Cathedral and the Bazaar
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1 Master on Free Software GSyC/Libresoft November 2008
2 (cc) 2008 (cc) 2007 Juanjo Amor, Gregorio Robles Some rights reserved. This work licensed under Creative Commons Attribution-ShareAlike License. To view a copy of full license, see or write to Creative Commons, 559 Nathan Abbott Way, Stanford, California 94305, USA.
3 Open Source How to study open source projects? Software Growth Distribution of work Social structure: Onion model Evolution of the core group Social Network Analysis Information Sources (SCM, BTS, mailing lists...) Tools (sloccount, mailstat, cvsanaly...)
4 Software Growth Lehman s laws (the Laws of Software Evolution) 2nd (1974) Increasing Complexity - As an E-type system evolves its complexity increases unless work is done to maintain or reduce it Godfrey and Gregorio Robles demostrate that Lehman s laws does not work in open source
5 Software Growth
6 Distribution of work Lorenz curve, is a graphical representation of the cumulative distribution function of a probability distribution The Gini coefficient is a measure of statistical dispersion most prominently used as a measure of inequality of income distribution or inequality of wealth distribution Pareto principle, rule
7 Distribution of work
8 Social structure: Onion model Kevin Crowston (Professor of Information Studies) The social structure of Free and Open Source software development (2004) Empiric model for open source projects, onion model
9 Social structure: Onion model
10 Social structure: Onion model User Start to participate in the community Report bugs Fix bugs Get an SCM account
11 Integration in a project
12 Evolution of the core group The project leader changes between different developers groups No project dependency in one developer Experiment Study the evolution of the main contributors in a project Several time slots
13 Evolution of the core group
14 Social Network Analysis (I)
15 Social Network Analysis (II)
16 Social Network Analysis (and III)
17 SNA for Linux 1.0
18 Developer Territoriality
How To Know More About Free Software Developers
Master on Free Software {jgato,teo}@gsyc.es GSyC/LibreSoft 28-29 November 2008 (cc) 2007-2010, Juanjo Amor, Gregorio Robles Some rights reserved. This work licensed under Creative Commons Attribution-ShareAlike
Getting the global picture
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A FLOSS Curriculum. EduCamp@FOSDEM 2009. Gregorio Robles and Jesús M. González-Barahona
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