Cyclomatic complexity measurement, an established but evolving technology, was introduced in 1976. Since that time it has been applied to tens of millions of lines of code in both Department of Defense (DoD) and commercial applications.
The resulting base of empirical knowledge has allowed software developers to calibrate measurements of their own software and arrive at some understanding of its complexity. Code graphing and complexity calculation tools are available as part (or as options) of several commercial software environments.
