salam,
Frankly speaking i have zero knowledge about this OVM thing. but i need to understand this OVM for my next project. The objective of using this methodology is to make sure you verify the system effectively. Next few days, ill be extract OVM cookbook. what exactly you need in order to develop you own verification. For those who a new with OVM, you may try google "ovmworld" website and search around there. A lot of useful stuff there for you to learn.