Architecture For Yii Application

Hello

I am a new to Yii Framework, I need to create and enterprise level product for designing Dynamic Templates that will be used for conducting surveys. Can anybody tell about the architecture of yii framework.

for this type of big application use modular structure.

Thanks for replying, It will be great help if you tell the flow for modular structure.

I didn’t found any good example of a total Modular application based on Yii, or any good Tutorial or Example on the 'net.

If you can provide any example