are you trying to say that even if GSQR for MBT is their, but since IA has chosen T90S then it would have satisfied their requirement, it does not matter if that tank fulfill GSQR for MBT or not.
I don't think you understand how any weapon is purchased. First of all, when choosing the T-90 the Army sends out a RFI or Request for Information. The manufacturer replies with what they can provide and what they cannot. This is followed by the RFP or Request for Proposal based on what's available. This RFP is like your GSQR. Once the RFP is received by the manufacturer they make the required changes to suit the RFP. This is pretty much it. After that the Army will conduct trials to find out if the RFP was satisfied or not. Modifications are made where needed and flaws are rectified during user trials. Since we have high ranking officials who keep saying the T-90 is the
Main Battle Tank, it is an established fact that the T-90 has been accepted into full service as the primary tank. Considering there have been repeated exercises using the tank in network centric and nuclear, biological and chemical environment situations, the tank is effectively part of the doctrine today.
In domestic productions, the Army sends out a RFI. The domestic industry with no experience completely accepts the RFI. Then a GSQR is setup which is like the RFP. The tank manufacturer designs, builds prototypes and conducts internal tests. After internal tests come user trials. The Army conducts user trials just like how the Army conducted user trials for the T-90. If flaws are found they are identified and rectified. Modifications are made depending on the need. If the Army likes the tank it is accepted into the force. This is how it works.
During the process there are
acceptable failures and
unacceptable failures. Unacceptable failures equate to a rejection. At the same time there are
acceptable shortcomings and
unacceptable shortcomings. These go through internal debates and the best solution is applied.
So, the tank has to fulfill RFP or GSQR or it is rejected. The same way as how Mig-35, F-16IN, SH and Gripen NG were rejected from MRCA trials. Like how Mi-28 was rejected from the attack helicopter trials. Like how many foreign and domestic manufacturers wares are rejected based on trials. It has always been the same since a long time.
Apart from all this there is such a thing as
deadline too.