Abstract Factory

Benefits:
 It isolates client from concrete (implementation) classes.
 It eases the exchanging of object families.
 It promotes consistency among objects.

Applicable Scenarios:
 The system needs to be independent of how its objects are created, composed, and represented.
 The system needs to be configured with one of a multiple family of objects.
 The family of related objects is intended to be used together and this constraint needs to be enforced.
 You want to provide a library of objects that does not show implementations and only reveals interfaces.