According to Levitt (1974) it is not so much the basic, generic,
central thing firms sell that counts, rather it is the whole cluster of
value satisfaction that surrounds it. He described the concept of supplementary
services as the ‘‘total product concept’’ (Levitt, 1980).
This concept consists of a core product, which is surrounded by three
concentric circles. The inner band surrounding the core product, he
termed as the expected product. The outer band is the augmented
products, which are the future benefits added to the core and expected
product to enhance the appeal of the product.