It is Web-Based Application but not purely.


The main scenarios in the payment submission are 

Security.
required handshaking codes exchange.
Data dump to be captured

Sorry Prasanna, the above answer is w.r.t the Q on payment 
submission and its scenarios.

The requiremnts review process is: 

To ascertain the adequacy of the contractor's efforts in 
defining system requirements. To determine initial 
direction and progress of the contractor's system 
engineering management effort and their convergence to an 
optimum and complete training system configuration.

When initial requirements are drafted by the analysts they 
send them to testing teams to analyse the requirements and 
let them know their feed back before Freezing the documents 
or baselining the documents .This process is called as 
requirements review process.