The main task of the SCM concept is continuous synchronization of value-adding in the entire network and continuous reconciliation with user demand. This is based upon the internal chain of “source,” “make,” and “deliver” in each of the companies involved. All requirements and possibilities of fulfilling them are carried by the network as a whole and reconciled jointly. The planning & control methods actually required to do this coincide in the main, of course, with the methods used in company-internal planning & control.