ramana, thanks and good pointers. I agree on the RC's decision to present the case of scalable TNs (s1).. and I am still wondering if it was BR that was more interested in TN rather the shakti team themselves, as we are racing to fill our missile sections with various types of weapon configurations [imaginary budget]

. But, believe me, BR is quite a deterrent for BiRadhers!
My point is, are we over blowing what RC said, and interpreting to a better deterrent presentations [just to cr@p the hell out of pakis?]. I am sure, defence wise, its unwise. I am seeing the truth somewhere in between, hence we have to agree with Arun says, that fizzle could have happened [my understanding of things work from fusion-fission].
Even logically agreeing that our TN did was configured to a lower scaled down version, there is no data that said, it was a failure from the perspective of explosion itself, but only the yield being reduced [based on the seismics]. Hence, the doubts are there as to if
1. the s1 was designed for that x yield.
2. yield was not obtained due to some issues.
let say, if we take positives from the both these arguments, that is, it is a scaled down TN, and yield was not up to what we expected, we still need to rework on the tests again.
I am only basing on discussions here in BR and other places. There is no emphatic answers. I am not a physics biggie as well, but have some fundamentals to understand to retain how things work, but poor memory and applications.
I wish to read some BR paper on the various analysis from Arun et al, and make a layman's perspective of things, who understand logic. There is nothing wrong is saying, ours need more work. nobody is perfect.