Re: Feasibility Study for Mainframe Testing using QTP
QTP can be used against Mainframe applications as long as they are access from a PC/Laptop through an emulator. The emulator needs to be one supported by QTP (I think they have support for all of the major ones but you could find this out from the Mercury Product/Add-In information).
As with many things there are some limitations but in using QTP on mainframe I have found it to be a good tool.
Other tools that I have used for mainframe testing are TestPartner and Winrunner.