Lessons Learnt from Gauging Software Metrics of Cabin Software in a Commercial Airliner

Table 1

Relationship between maintainability characteristics and software metrics (adapted from [6]).

Maintainability characteristic	Commonly related software metrics
Analyzability	Vocabulary size, difficulty, volume, effort, average size of statements, fan-out, cyclomatic complexity, maximal nesting
Changeability	Vocabulary frequency, unconditional jumps, maximal nesting, lack of cohesion, coupling
Stability	Number of entry points, number of exit points, fan-in
Testability	Test coverage