What is Cyclometric Number? Where it is used?

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  • Dec 11th, 2007

Complexity measures the simpleness and understandability of a design. In this

area most of the research on business process metrics has been done (Cardoso,

Mendling, Neumann & Reijers, 2006; Gruhn & Laue, 2006, Latva-Koivisto, 2001).

For instance, both (Gruhn & Laue, 2006) and (Cardoso, Mendling, Neumann & Reijers,2006) consider the adaptation of McCabe's cyclometric number as a complexity metric for business processes. This complexity metric directly measures the number of linearly independent paths through a program’s source code. In practice,the industry interpretation of McCabe's cyclomatic complexity thresholds are the following (Frappier, Matwin, & Mili, 1994): from 1 to 10, the program is simple;from 11 to 20, it is slightly complex; from 21 to 50, it is complex; and above 50 it is untestable.


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  • May 13th, 2008

Basically its a white box testing technique for generating test cases. The cyclometric complexity indicates the level of the logical complexity of the program. It indicates the number of independent paths that exist in the program. Once we have identifed the number if independent paths and the their number we can write tets cases so that each and very path is executed atleast once.In this we can check the qulaity of the code written by us.

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Cyclomatic complexity is software metric that provides a quantitative measure
of the logical complexity of a program. Cyclomatic complexity has a foundation
in graph theory and provides us with extremely useful software metric.
Complexity is computed in one of the three ways:
1. The number of regions of the flow graph corresponds to the Cyclomatic
2. Cyclomatic complexity, V (G), for a flow graph, G is defined as V (G) = E-N+2
   Where E, is the number of flow graph edges, N is the number of flow
graph nodes.
3. Cyclomatic complexity, V (G) for a flow graph, G is also defined as: V (G) =
   Where P is the number of predicate nodes contained in the flow
graph G.

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