The loss development potential of a hazard. Risk surveyors are concerned not only with the likelihood of a loss (the inception hazard) but whether the development of a loss will be minimal or severe. Risk mapping correlates probability and severity.

(1) in one year accounting, in relation to any underwriting year, any year or years following the end of that year until the claims for that year have been run off, (2) in general business funded accounting the year or years between the underwriting year and the closing of the account.