Then, the application is tested in conjunction with other applications in the same module, cycle, or class of transactions.That often requires a more robust environment than earlier testing of the application as stand-alone.A staging area has become one of the best ways to perform this test, where a simulator is created of the entity's infrastructure, applications, systems and databases.But, that is not the end either.The application should be tested in the context of the enterprise system, with all of the data transfers and interfacing that goes on in actual IT operations.That process in particular needs a staging area.