An industry which manufactures and sells products that are liable to failure (e.g. TV sets, tape recorders, washing machines or refrigerators), usually has a department for “service after sales”. Such a department must distribute information on how to repair products, and has to supply spare parts to replace defective components during a given number of years. We call these parts service parts . Three phases can be distinguished in the life‐cycle of service parts:
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Leonard Fortuin (1980) studied this question.
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