Cash flow is the most rigorous financial tool used in today's corporate world. It is rigorous by itself, as it is not subject to influences that give different results under each interpretation. The statement of cash flows has reached vital importance nowadays in corporate finance. It is important to manage cash flow almost daily using efficient tools like cash pooling. On the other hand, it is also important to remember that there are different types of cash flows to be used depending on the objective you are after.