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Actuarial forecasts are practical for all products and service parts, including automotive aftermarket service parts. They have been used by the Air Force Material Command for service planning and parts procurement for major engine modules [1, 2], and airlines use them for “fracture critical” engine and structure parts. An automotive aftermarket information provider sells actuarial forecasts of parts demands. It reports that its clients see profits increase 15% when they stock parts accordingly. Actuarial forecast accuracy and precision are substantially better than those of forecasts based on time series extrapolation [3].

Controlled drift into terrain (CDIT) causes most wheel balance weight failures. Faulty installation causes only a small fraction. Prevent CDIT failures by installing wheel weights on the insides of wheels, at least on the front wheel on the side opposite the driver. The field data are: balance weights collected during two years from the streets of three zip codes vehicle registrations in those zip codes The balance weights were the clip-on, not the stick-on, type. The field failure rate per vehicle per year is 0.0044.