The design … that was in the nature | one of the design concept OOCSS also BEM also a number

Discussion about “BEM” , which is a naming rule for CSS for managing site, seems hot recently.
Either OOCSS or BEM is just one of many methods, it can’t be introduced to sites without thought.
Sometimes thoughtless introduction causes only demerits such as learning cost and redundant code.
Knowledge and flexibility is needed for selecting appropriate method for site scale and naturality.

BEM and new method of Sass 3.3
http://blog.ruedap.com/2013/10/29/block-element-modifier