It also makes sense to view the other functional terms found all along the company’s value chain, namely procurement, production, and sales, from the management perspective. In the literature, functional terms are usually defined clearly and distinctly. In contrast, for management terms — like procurement management, production management, and sales management — you will often not find formal definitions. In practical usage, however, these terms do not differ significantly from the definitions given above for logistics or operations management. This is not surprising, for it is impossible to conduct successful operations management if it is applied to only a part of the value chain. For this reason, we assume in the following that there are no significant differences among all these management terms (see also [GüTe97]).