The Curve Sets Your Attachment, Not Your Limit
The standard method for sizing a cyber program from a loss curve has two halves. Set the retention where the balance sheet can absorb the loss, and set the limit at the one-in-hundred-year figure. The first half is sound. The second is a convention borrowed from property catastrophe practice, and the curve does not derive it. The distinction matters because organizations treat both numbers as outputs of the same model, then defend a limit the model never produced.