Interesting question.

The bankable feasibility study is prepared by companies that want to take a project to production and will need financing...possibly from banks. It is more detailed than a preliminary study and would include:

- a resource estimate

- complete metalurgical studies assessing recoveries and milling/ refining requirements

- a complete mining assessment including mining infrastructure/methods and costs

- a production estimate of grades, annual production levels and costs

- estimates of IRR (internal rate of return) and payback period

- a risk assessment

These are only a few of the obviuos components. The purpose is to provide the lenders with the info required to make a decision on funding.

If a company is well funded and does not need to borrow they will not do a BFS in order to save money and time.

Just my 2 cents

SN