Abstract
The increased availability of data created as part of the software development process allows us to apply novel analysis techniques on the data and use the results to guide the process's optimization. In this paper we describe various data sources and discuss the principles and techniques of data mining as applied on software engineering data. Data that can be mined is generated by most parts of the development process: requirements elicitation, development analysis, testing, debugging, and maintenance. Based on this classification we survey the mining approaches that have been used and categorize them according to the corresponding parts of the development process and the task they assist. Thus the survey provides researchers with a concise overview of data mining techniques applied to software engineering data, and aids practitioners on the selection of appropriate data mining techniques for their work.