@article {flosswp125,
	title = {Determining the Distribution of Maintenance Categories: Survey versus Measurement},
	year = {2003},
	month = {October},
	abstract = {In 1978, Lientz, Swanson, and Tompkins ("LST") published the results of a survey on software maintenance. They found that 17.4\% of maintenance effort was categorized as corrective in nature, 18.2\% as adaptive, 60.3\% as perfective, and 4.1\% was categorized as other. We contrast this survey-based result with our empirical results from the analysis of data for the repeated maintenance of a commercial real-time product and two open-source products, the Linux kernel and GCC. For all three products and at both levels of granularity we considered, our observed distributions of maintenance categories were statistically very highly significantly different from LST. In particular, corrective maintenance was always more than twice the LST value.},
	attachments = {https://flosshub.org/sites/flosshub.org/files/lst.preprint.pdf},
	author = {Jin Schach}
}
@article {flosswp123,
	title = {Quality Impacts of Clandestine Common Coupling},
	year = {2003},
	month = {October},
	abstract = {The number of instances of common coupling between a module M and the other modules can be changed without any explicit change to M; this is termed "clandestine common coupling." This paper presents results from a study of clandestine common coupling in 391 versions of Linux. Specifically, the common coupling between each of 5332 kernel modules and the rest of the product as a whole was measured. In more than half of the new versions, a change in common coupling was observed, even though none of the modules themselves was changed.},
	attachments = {https://flosshub.org/sites/flosshub.org/files/clandestine.preprint.pdf},
	author = {Jin Schach}
}
