The life of the auto, as the collection, follows, according to a very common model, a bathtub-like pattern. After an initial phase, where failure because of design and manufacturing defects as opposed to wear-out, is more likely (hence the offering of the warranties by the manufacturer), there may be a long period of unlikely failure. The maximum lifespan and future value as a classic for any car are typically not known when the car is purchased. Research into longevity of vehicles will improve the ability to predict car life, with such things as a life table for cars.