risk of outage + its costs vs. risk of mitigation + its costs. or as fight club said > Take the number of vehicles in the field, A, multiply by the probable r

risk of outage + its costs vs. risk of mitigation + its costs. or as fight club said > Take the number of vehicles in the field, A, multiply by the probable rate of failure, B, multiply by the average out-of-court settlement, C. A times B times C equals X. If X is less than the cost of a recall, we don't do one.