Meaning of 'Assertion level'?

CA Abhishek Singh (practice) (2099 Points)

27 September 2011  

dear everyone,

please some one explain me the meaning of the term "assertion level". 

what it means for the following sentence.



audtor should assess the risk of material misstatement at "assertion level"



explanation with an example will be highly appreciated.



waiting urgently for your reply.

Thanks in advance