Mercer leverages proprietary data, landmark global surveys, and advanced tools to design cost-efficient and relevant global employee benefits. It allows us to: Review worldwide benefits plans. Benchmark local market data. Optimize your benefits spend. Leverage global buying power.
Domain Classes and Objects. Objects that represent domain entities are called entities or domain objects. The classes they instantiate are called domain classes. Executing a use case involves creating, destroying, querying, and updating domain objects.
The classes and objects participating in this pattern are: 1  Subject (Stock). 2  knows its observers. 3  Any number of Observer objects may observe a subject. 4  provides an interface for attaching and detaching Observer objects. 5  ConcreteSubject (IBM).