手法を比較

	技術的負債の測定	欠陥予測モデル
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	1992	2005
提唱者	Ward Cunningham	Thomas Ostrand, Elaine Weyuker, Robert Bell
種類	quantitative assessment	machine learning model
原典	Cunningham, W. (1992). The WyCash Portfolio Management System. OOPSLA 92 Experience Report.	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.
別名	debt metrics, code health scoring, maintenance burden assessment	fault prediction, bug prediction, defect classification
関連	4	4
概要	Technical debt represents accumulated shortcuts, deferred maintenance, and design compromises that incur future costs through slower development, higher defect rates, and deployment difficulty. Introduced by Ward Cunningham (1992), technical debt measurement quantifies these burdens using metrics like code complexity, duplication, test coverage gaps, and maintainability indices. Organizations use debt measurement to balance immediate delivery with long-term sustainability.	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.