Companies have to determine which real net output ratio is the best for them. In such a case a company must decide which combination of product components and processes should be produced internal or external. There are no methods available to analyze the benefits of an internal or external manufacturing for products with high variety. However, due to the increasing number of variants and the low real net output ratio this question becomes more and more important. Therefore this article will introduce a method capable to support the make or buy decision for products with high variety.
