I was unsure of what a scoping study actually is, so I found this article on Feasibility Studies and how a Scoping Study fits in. I've copied an exerpt from the article pertaining to the scoping study (first step leading to a Feasibility Study) but the full article is here http://www.pincock.com/perspectives/Issue57-Feasibility-Study.pdf

Recommended Steps to Reach the Feasibility Study Stage
A conceptual study, also referred to as a scoping study, is the first study that should be completed on a project. This is the preliminary evaluation of a project and is based on assumptions and factors. There should be a sufficient level of drilling and sampling to define a resource, simple flow sheet, and mining method. Production schedules, and cost estimates are based on limited data and test work and as a result rely more on experience and industry standards. Therefore, the accuracy of these initial studies is typically +/- 35 to 40 percent. Conceptual studies typically identify technical issues that will require additional examination or test work. Generally, the end result of the study is a description of the general features and parameters of the project and an order of magnitude estimate of capital and operating costs. A study of this level is valid to determine whether a project is worth pursuing further but the economic parameters are not sufficient for reserve definition.

SRV