If there is no difficulty in converting a design into a product (e.g., a hollow cylinder), there is no difficulty available to be removed using AM. Then AM cannot demonstrate its advantage of how it simplifies a complex design into a set of simple steps, but AM can still be used if it is better than other techniques—this is the advantage of AM over other techniques. This advantage only shows how the conversion of a design is simplified in AM. The simplification has limited value if the conversion is limited only to simple designs. This simplification has no value if the conversion is limited only to simple designs, while the conversion is sought for complex designs. Therefore, the simplification, which is the freedom to add materials layer by layer, is a characteristic rather than an advantage.