To calculate Y, we must pick a value from the range of values found in the simulation data for the total cost, and calculate the difference between this value and X.
Instead of just calculating a single Y, DynRisk provides three such values. Each of these corresponds to a certain contingency level. In a given situation, you will probably end up using just a single contingency level to calculate Y. However, which one will depend on the actual situation.
DynRisk lets you choose between two different types of levels:
窶｢ Fractiles
窶｢ Mean ﾂｱst.dev
If you choose the 窶廡ractiles窶 option, the contingency levels will be calculated according to the current fractile set. Thus, if e.g., this fractile set is 窶10%, 50%, 90%窶, then contingency levels will be calculated as the 10%-, 50%-, and 90%-fractiles of the total cost 窶彭ata node窶.
If you choose the 窶廴ean ﾂｱst.dev窶 option, the three contingency levels will be (窶廴ean窶 - 窶徭t.dev窶), 窶廴ean窶, and (窶廴ean窶 + 窶徭t.dev窶). Here 窶廴ean窶 is the mean of the simulated values, and 窶徭t.dev窶 is the standard deviation of the simulated values.
