"projects that do not exhibit obvious corporate or organizational sponsorship or involvement, projects with at least one software release in a relatively mature development stage (Beta or Production/Stable), projects exhibiting a minimum level of project activity, and products written only using Java."
"The frame includes approximately 180 projects from which a random sample of 46 was drawn"
"For each project, we sample each major software release (e.g. 1.x, 2.x) as our unit of analysis for a total of 203 releases."
"We calculate the degree of modularity for each major software release sampled using the source code contained in each release"
"To measure intrinsic software quality, we calculate the number of static bugs and software complexity based on objective evaluations of the source code included in the software release using two static source code analysis tools"
"To assess customer satisfaction, we use three measures of software quality previously identified in OSS research as a proxy for software quality and OSS project success [3]: number of bugs reported, percentage of bugs closed, and time to close bugs."
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