298 Planning and Forecasting later. Since the cash f low is deferred, the true value of that sale to the firm is somewhat diminished. By focusing on cash f lows and when they occur, NPV ref lects the true value of increased revenues and costs. Consequently, NPV analysis requires that accounting data be unraveled to reveal the underlying cash f lows. That is why changes in net working capital must be accounted for and why depreciation does not show up directly. Principle No. 2: Use Expected Values There is always going to be some uncertainty over future cash f lows. Future costs and.
