Just found a definition of a scoping study and it says," a...

Just found a definition of a scoping study and it says,

" a hypothetical development scenario and is based on preliminary information "

Pre-feasibility on the other hand,

"The key differences between a scoping study and a feasibility study have to do with:

stage of the project -- scoping study is limited to early stage projects

usage of inferred resources -- a scoping study, with strict disclosure requirements, may use inferred resources. A feasibility study would be restricted to Proven and Probable reserves plus Measured and Indicated resources.

Given that Inferred resources have a greater uncertainly associated with them, a scoping study relying on Inferred resources is going to have a much higher degree of uncertainty associated with it than a feasibility study limited to reserves and Measured + Indicated resources would have."

http://www.goldminerpulse.com/blogs/what-is-a-scoping-study.php

The above is Canadian, but unable to find anything for Australia quickly enough.