{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,6,19]],"date-time":"2025-06-19T04:41:44Z","timestamp":1750308104560,"version":"3.41.0"},"reference-count":12,"publisher":"Association for Computing Machinery (ACM)","issue":"4","license":[{"start":{"date-parts":[[2005,5,15]],"date-time":"2005-05-15T00:00:00Z","timestamp":1116115200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.acm.org\/publications\/policies\/copyright_policy#Background"}],"content-domain":{"domain":["dl.acm.org"],"crossmark-restriction":true},"short-container-title":["SIGSOFT Softw. Eng. Notes"],"published-print":{"date-parts":[[2005,7]]},"abstract":"<jats:p>Libre (free\/open source) software provides an ample range of publicly available data sources about its development, which can be retrieved and analyzed. Consequently, it offers a good opportunity to build predictive estimation and evolution models. The main challenge to understand libre software development is that its development nature is radically different from 'classical' in-house software development, common in industry in the last decades. Developers and other human resources are generally a mixture of a few hired developers and many volunteers whose contribution (in number of hours per week and in total time devoted to the project) is not foreseeable in advance. This paper is a first step in finding predictive models in the libre software world. We have studied three data repositories (versioning system, mailing lists and bug tracking system) of GNOME, a large libre software project with several thousand contributors and several millions of lines of code, measuring activity and participation in it during the last years. Results and correlations for these sources allow us to adventure some first estimations of how participation and activity will evolve in the future.<\/jats:p>","DOI":"10.1145\/1082983.1083168","type":"journal-article","created":{"date-parts":[[2005,11,7]],"date-time":"2005-11-07T19:28:32Z","timestamp":1131391712000},"page":"1-6","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Towards predictor models for large libre software projects"],"prefix":"10.1145","volume":"30","author":[{"given":"Israel","family":"Herraiz","sequence":"first","affiliation":[{"name":"Universidad Rey Juan Carlos, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gregorio","family":"Robles","sequence":"additional","affiliation":[{"name":"Universidad Rey Juan Carlos, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jesus M.","family":"Gonzalez-Barahona","sequence":"additional","affiliation":[{"name":"Universidad Rey Juan Carlos, Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2005,5,15]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"The Mythical Man-Month","author":"Brooks F. P.","year":"1995","unstructured":"F. P. Brooks , Jr. The Mythical Man-Month . Addison Wesley , anniversary edition, 1995 . F. P. Brooks, Jr. The Mythical Man-Month. Addison Wesley, anniversary edition, 1995."},{"key":"e_1_2_1_2_1","first-page":"201","volume-title":"Journal of Software Process: Improvement and Practice","author":"German D.","year":"2004","unstructured":"D. German . The GNOME project: a case study of open source, global software development . Journal of Software Process: Improvement and Practice , pages 201 -- 215 , Aug. 2004 . D. German. The GNOME project: a case study of open source, global software development. Journal of Software Process: Improvement and Practice, pages 201--215, Aug. 2004."},{"key":"e_1_2_1_3_1","doi-asserted-by":"publisher","DOI":"10.5555\/850948.853411"},{"key":"e_1_2_1_4_1","volume-title":"Proceedings of the Fourth International Conference on eXtreme Programming and Agile Processes in Software Engineering","author":"Gonzalez-Barahona J. M.","year":"2003","unstructured":"J. M. Gonzalez-Barahona and G. Robles . Unmounting the \"code gods\" assumption . In Proceedings of the Fourth International Conference on eXtreme Programming and Agile Processes in Software Engineering , 2003 . J. M. Gonzalez-Barahona and G. Robles. Unmounting the \"code gods\" assumption. In Proceedings of the Fourth International Conference on eXtreme Programming and Agile Processes in Software Engineering, 2003."},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2575.2002.00110.x"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.5555\/823454.823901"},{"key":"e_1_2_1_7_1","first-page":"93","volume-title":"Proceedings of the USENIX 2004 Annual Technical Conference, FREENIX Track","author":"Michlmayr M.","year":"2004","unstructured":"M. Michlmayr . Managing volunteer activity in free software projects . In Proceedings of the USENIX 2004 Annual Technical Conference, FREENIX Track , pages 93 -- 102 , Boston, USA , 2004 . M. Michlmayr. Managing volunteer activity in free software projects. In Proceedings of the USENIX 2004 Annual Technical Conference, FREENIX Track, pages 93--102, Boston, USA, 2004."},{"key":"e_1_2_1_8_1","doi-asserted-by":"publisher","DOI":"10.1145\/567793.567795"},{"key":"e_1_2_1_9_1","volume-title":"Operations Research in Research and Development","author":"Norden P.","year":"1963","unstructured":"P. Norden . Useful tools for project management . Operations Research in Research and Development , 1963 . P. Norden. Useful tools for project management. Operations Research in Research and Development, 1963."},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1109\/TSE.1978.231521"},{"key":"e_1_2_1_11_1","first-page":"111","volume-title":"Proceedings of the 3rd Workshop on Open Source Software Engineering","author":"Robles G.","year":"2003","unstructured":"G. Robles , J. M. Gonzalez-Barahona , J. Centeno-Gonzalez , V. Matellan-Olivera , and L. Rodero-Merino . Studying the evolution of libre software projects using publicly available data . In Proceedings of the 3rd Workshop on Open Source Software Engineering , pages 111 -- 115 , Portland, Oregon , 2003 . G. Robles, J. M. Gonzalez-Barahona, J. Centeno-Gonzalez, V. Matellan-Olivera, and L. Rodero-Merino. Studying the evolution of libre software projects using publicly available data. In Proceedings of the 3rd Workshop on Open Source Software Engineering, pages 111--115, Portland, Oregon, 2003."},{"key":"e_1_2_1_12_1","doi-asserted-by":"publisher","DOI":"10.5555\/998675.999514"}],"container-title":["ACM SIGSOFT Software Engineering Notes"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1082983.1083168","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/dl.acm.org\/doi\/pdf\/10.1145\/1082983.1083168","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,6,18]],"date-time":"2025-06-18T16:08:05Z","timestamp":1750262885000},"score":1,"resource":{"primary":{"URL":"https:\/\/dl.acm.org\/doi\/10.1145\/1082983.1083168"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2005,5,15]]},"references-count":12,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2005,7]]}},"alternative-id":["10.1145\/1082983.1083168"],"URL":"https:\/\/doi.org\/10.1145\/1082983.1083168","relation":{"is-identical-to":[{"id-type":"doi","id":"10.1145\/1083165.1083168","asserted-by":"subject"}]},"ISSN":["0163-5948"],"issn-type":[{"type":"print","value":"0163-5948"}],"subject":[],"published":{"date-parts":[[2005,5,15]]},"assertion":[{"value":"2005-05-15","order":2,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}