"Actual business, often, a component in some of the products, can be another element instead. Can only be managed by a specific substitutes.
When used to replace components due because of price, quality or discontinued and so on, need to remove and replace a component for another, very difficult to maintain.
For example, a specific substitutes for a series of 100 products, you need to modify 100 product structure. Inefficiency.
Really looking forward to increase the bulk in the task to modify the function to change the relationship between specific alternatives, and change the number of batches of product structure similar functions."