Page 89 - CISSO_Prep_ Guide
P. 89
significant risk before addressing less critical risk factors. Since
most organizational budgets are based on an annual cycle, using
the ALE aligns the risk value with the budget cycle.
Problems with Quantitative Risk Assessment
The problem with a quantitative risk assessment approach is the
lack of accurate data that can be used in the calculations. Even
where there is excellent historical data, factors may change that
significantly alter the trustworthiness of the estimates. It also
takes a lot of time and effort to complete an accurate (or at least
as precise as possible) quantitative risk assessment. Risk
assessment requires the input of many experts, interrupts
business operations, and may create some resentment about the
value of the risk assessment, especially concerning the amount
of work and time required.
The results of a quantitative risk assessment will be a report that
lists the risks and indicates their relative cost. This allows for the
prioritization of risk and the development of a risk response
strategy that can be based on cost-benefit analysis.
Qualitative Risk Assessment
The foundation for qualitative risk assessment is the ranking of
the level of risk for various risk scenarios. Instead of putting
absolute (monetary) values on the cost and likelihood of an
event as seen earlier in quantitative risk assessment, qualitative
risk assessment uses a range of benefits to measure impact and
probability.

