â?¢ Re-use of previous work: using implementation inheritance and object composition.
â?¢ Real mapping to the problem domain: Objects map to real world and represent vehicles, customers, products etc: with encapsulation.
â?¢ Modular Architecture: Objects, systems, frameworks etc are the building blocks of larger systems. The increased quality and reduced development time are the by-products of the key benefits discussed above. If 90% of the new application consists of proven existing components then only the remaining 10% of the code have to be tested from scratch.