Keyphrases
- open source software
- source code
- software projects
- software systems
- software development
- open source
- software metrics
- open source projects
- open source software development
- free software
- high level
- software quality
- software engineering
- software maintenance
- software components
- mailing lists
- development cycle
- maintenance effort
- software evolution
- software repositories
- bug reports
- raw data
- case study