Explanation:
The common practice, when it is difficult to calculate the financial losses, is to take a qualitative approach, in which the manager affected by the risk defines the financial loss in terms of a weighted factor {e.g., one is a very low impact to the business and five is a very high impact). An ROI is computed when there is predictable savings or revenues that can be compared to the investment needed to realize the revenues. Amortization is used in a profit and loss statement, not in computing potential losses. Spending the time needed to define exactly the total amount is normally a wrong approach. If it has been difficult to estimate potential losses (e.g., losses derived from erosion of public image due to a hack attack), that situation is not likely to change, ant at the end of the day, the result will be a not well-supported evaluation.