Adulteration

Nature 
It is the use of cheaper materials in the production of an article so as to transform it into an inferior article. The consumer or the purchaser can not distinguish this as inferior.
Incidence 
The criminal adulteration of food by retailers, for example, mixing chalk with flour or dilute milk with water, is not new. In 1981 in Spain more than 600 people died of adulterated rape seed oil.
Strategy(ies) 
Type 
(D) Detailed problems