There are risks to be aggregated, whatever aggregate. Fast is clear that aggregate is not the same as adding. You can add just apples and pears and apples or pears, but apples and pears, because they are "different nature".
How does it look for two (or more) risks of different nature? A strategic risk plus an operational risk plus a financial risk! Is there an overall risk position, and if so, are there a method of Aggegation? Quickly realize that it probably also in the understanding of risk as an effect of magnitude * probability of occurrence of the event, no method for a metric be in the system of basic arithmetic, since the probability represented only in ideal and theoretical cases by a single real number. In real and practical cases, a distribution function for the probability of her wherever. Which is not the question is raised whether and what sense it makes to aggregate risks "of different nature."
The solution of the problem I do not give here!
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