Which Model is Best for BJT Analysis: Hybrid Pi or T-model?

[Huumah]

Hi.
I was just wondering about when I'm doing small singla analysis with Bipolar Junction Transistor (BJT) is there a basic rule on which model to use, the Hybrid Pi or the T-model?

 

[yungman]

I personally always use hybrid ∏, never even use the T model. Here is an article on basics of BJT:

http://whites.sdsmt.edu/classes/ee320/notes/320Lecture14.pdf

As the article said at the end, hybird ∏ is much more common. The only time I have seen T model is for common base configuration, I am not even 100% sure at that.