UVM Factory what is it ? and it helps ?

 How can we add new functionality to our testbench ?

• A Key UVM guideline is to write our testbench once
• Basic functionality description which has a good transcations
• Extend the classes to add new functionality
• Need to make sure it won't break the existing setup

• UVM Factory
• Creates objects in the UVM Testbench
• Allows the new written tests to "override" the original defined object 

• Factory overrides are Very Important
• Factory overrides make it possible to write many complex scenarios to run on the same testbench
• Each test can customize the testbench at run time for the speicific needs of that test.