%0 Conference Proceedings %B Proceedings of the 4th ICSE Workshop on Open Source %D 2004 %T Open Source and Closed Source Software Development Methodologies %A Potdar, V. %A Chang, E. %K life cycle %K lifecycle %X Open source software development represents a fundamentally new concept in the field of software engineering. Open source development and delivery occurs over the Internet. Developers are not confined to a geographic area. They work voluntarily on a project of their choice. As new requirements emerge, the software is enhanced by the user/developers. In this paper we show a comparative study of open source and closed source software development approaches and present a software life cycle model for open source software development. %B Proceedings of the 4th ICSE Workshop on Open Source %P 105-109 %> https://flosshub.org/sites/flosshub.org/files/potdar106-110.pdf