It is pointed out that an exact and rational result can be obtained by joint optimization of car flow routing and marshallingplan.
车流径路和编组方案统一起来进行优化，会得到更加精确和合理的结果。
2
At the same time, the paper raised the adjustment programs of marshallingplan of district trains from Xinfen Town and Xi 'an East to Baoji East, and related issues needed to be solved.
同时，提出新丰镇和西安东开往宝鸡东的区段列车编组计划调整方案以及需要解决的相关问题。
3
Hence, the train formation plan, given a group of formations, with the constraint of marshalling capacity can be transformed into a wagon path problem.