Net Present Value (NPV) :
In this technique, future cash flows are discounted to the present and then compared with the investment outlay. The basic discount rate is generally the cost of capital to the enterprise. For ranking the projects along with this procedure, the NPVs of several another projects are compared. Project with highest positive NPV or a project with highest NPV is given highest rank.
In the case of independent projects, if the present value of cash inflows of a project is higher than the present value of investment outlay of the project, it should be accepted. if not, it should be rejected. In the case of equally exclusive projects, a project with highest NPV should be accepted.