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Severity Modelling: Selecting and
Calibrating a Severity Model
The objective of severity analysis is the production of a severity model (Figure 16.1) for
the loss amounts. A severity model is not only essential to calculate – in combination with
a frequency model– the distribution of aggregate losses but also will help us to reply to
questions suchas
• What is the probability that an individual loss is going to be as big as £100,000?
• What level of deductible is adequate for this risk?
• What limit should I purchase for my public liability policy?
All the questions above are not questions about the total losses but about the distribution ...