Comparing Maintainability Index, SIG Method, and SQALE for Technical Debt Identification

Table 1

Mapping matrix of the SIG model, example of analysability (adapted from Heitlager et al. [37]).

	Source code properties
	Volume	Complexity per unit	Duplication	Unit size	Unit testing
Maintainability	x		x	x	X
Analysability
Changeability		x	x
Stability					x
Testability		x		x	x