Custom Verification Methods

Hi, 

I want to customize the verifiy method coulmn in requirements table. 

As of now only 4 methods are available to choose from (Inspection, Analysis, Demonstration and Test).

I want 'Simulation, Lab test, Rig Test, etc..' to be added in verification methods. Also I wish to verify the requirments using multiple verification methods, but I am allowed to choose only 1 out of 4 methods(as metioned above).  

Any solution to this?

 

Thanks in advance.

Amit K.