Transportation Planning with Different Forwarding Limitations

In recent publications, it is assumed that there are transportation requests which have to be fulfilled by certain resources (e.g., own vehicle fleet or external carriers) due to contractual obligations. These requests are known as compulsory requests. The contribution of this publication is to identify the increase in transportation costs caused by a combination of compulsory requests with different contractual obligations. To evaluate the impact of compulsory requests, an existing column generation-based heuristic with two solution strategies for handling compulsory requests is applied and the generated results are analyzed.