Brand extensions V/s Launching a new Brand

Existing Brand : Suffola
Brand extension : Suffola snacks.
Risk in Brand extension: Wrong positioning may spoil your existing brand. In suffola case, It is positioned as a healthy product. But snacks is far away from the health concept, it is used for taste. 

Existing Brand : Horlicks
Launching a new Brand : Foodles.
Risk in launching a new Brand : Relatively high Cost to establishment.

Please  go through this video :

http://economictimes.indiatimes.com/videoshow/7526588.cms