A method for predicting parts for onsite repair which takes into account a
repair history and the costs associated with mis-predictions. Parts for
onsite repair of a product are predicted by determining an expected waste
for one or more parts of the product. The parts having a lowest expected
waste are selected and sent to the onsite repair. The expected waste
indicates parts that are responsible for high support costs and
highlights the mistakes being made and scores the mistakes by actual
cost.