手法を比較

	欠陥予測モデル	ソフトウェア複雑性メトリクス
分野	ソフトウェア工学	ソフトウェア工学
系統	Process / pipeline	Process / pipeline
提唱年	2005	1976
提唱者	Thomas Ostrand, Elaine Weyuker, Robert Bell	Thomas J. McCabe
種類	machine learning model	quantitative measurement
原典	Ostrand, T. J., Weyuker, E. J., & Bell, R. M. (2005). Predicting the location and number of faults in large software systems. IEEE Transactions on Software Engineering, 31(4), 340–355.	McCabe, T. J. (1976). A complexity measure. IEEE Transactions on Software Engineering, 2(4), 308–320.
別名	fault prediction, bug prediction, defect classification	code complexity analysis, complexity measurement
関連	4	4
概要	Defect prediction models forecast the likelihood of software faults in code modules using statistical or machine learning approaches. Pioneered by Ostrand, Weyuker, and Bell (2005), these models correlate code metrics (complexity, churn, coupling) with historical defect data to identify high-risk components. Organizations use predictions to allocate testing resources, guide code review, and prioritize refactoring.	Software complexity metrics quantify the structural and operational difficulty of code through numerical measurements. Introduced by Thomas McCabe in 1976, cyclomatic complexity became the foundational approach. These metrics assess maintainability, testability, and defect risk, enabling teams to identify problematic code regions and guide refactoring efforts.