Rule Definition
Excessive coupling is detrimental to modular design since classes are not independent. A large efferent coupling indicates that a class is unfocussed and may also indicate that it is unstable, since it depends on the stability of all the types to which it is coupled. This prevents reuse since a high coupling possibly indicates a package is poorly designed and difficult to understand/maintain. Extracting classes from the original class so the class is decomposed into smaller classes can reduce efferent coupling, this improves modularity and promotes encapsulation.
Remediation
Review the packages in order to be sure that they do not have High Efferent Coupling.
Reference
https://www.researchgate.net/publication/314082764_Software_Instability_Analysis_Based_on_Afferent_and_Efferent_Coupling_Measures
Related Technologies
JEE
Technical Criterion
Architecture - Object-level Dependencies
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