The business case will give form to your idea. Following by the feasibility study.
A feasibility study aims to objectively and rationally uncover the strengths and weaknesses of your business idea or proposed venture, opportunities and threats..
The study will give indications of the resources required to carry through, and ultimately the prospects for success. In its simplest terms, the two criteria to judge feasibility are cost required and value to be attained.
A well-designed feasibility study should provide a historical background of the business or project, a description of the product or service, accounting statements, details of the operations and management , marketing research, and policies, financial data, legal requirements and tax obligations.