Divergent product structure is often used as a synonym for by products arising in continuous production (see Section 3.4.3). In chemical or oil production, which is a typical example from the process industry, processing of the basic material yields – in one single process – several active substances as well as waste or by products. In the food industry there are by products that, through recycling, can be used as basic materials in another production process (such as scrap chocolate). The triangle pointing down symbolizes an upside down, arborescent structure as the product structure. Note that a divergent product structure should not be confused with the multiple use of a component in different products.