Software measurements can be used to estimate cost and effort and provide feedback to improve quality. Cyclomatic complexity captures the complexity of conditional logic in a program using graph theory and McCabe's metric. It counts linearly independent paths to determine testability and understandability. Cohesion measures relationships within a module while coupling measures relationships between modules.

1. Software Measurement
Prepared by
Md. Shafiuzzaman

2. Uses of software measurements
• Estimation of cost and effort
• Feedback to improve the quality of design and implementation

3. Cyclomatic Complexity
• Capture the complexity of a program’s conditional logic
• McCabe’s metric is based on graph theory, in which you calculate the
cyclomatic number of a graph G, denoted by V(G), by counting the
number of linearly independent paths within a program.
where e is the number of edges, n is the number of nodes

5. Uses of Cyclomatic Complexity
• originally designed to indicate a program’s testability and
understandability
• determine the minimum number of unique tests that must be run to
execute every executable statement in the program

6. Cohesion & Coupling
• Cohesion is the indication of the relationship within a module
• Coupling is the indication of the relationships between modules

7. Example of Low and High Cohesion