A feasibility study is the initial design stage to any project or plan. It is an analysis into the viability of an idea. They help determine if the company possess the required resources or technologies and does the proposal offer a reasonable return vs. risk from the investment?
They usually contain:
Feasibility studies are different from business plans. Feasibility studies investigate whether an action is a viable business venture. A business plan provides a planning functions and outlines the actions needed to take the proposal from an idea to a reality.
For more information, check out:
What is A Feasibility Study (Iowa State University)
When to Do and How to Use a Feasibility Study