Interesting Cold War era threat assessment - Soviet point of view

[Exiled Penguin]

The ratings (at least for AFVs) are based on assigning a T-55 value of "1.0". thus you can see (at least the ground combat systems) as being compared in their effectiveness to T-55.

The exact method is not that important TBH and can be easily taken as a "black box" - the end result is what counts (and what counted in the heads of appropriate planners).