通过增添虚拟工序和元素替代等手段，将不平衡问题变为平衡问题，运用“匈牙利算法”得到选配结果，重复匹配过程，可以得到多条工艺路线。
The matching of process with equipments can be changed into assignment problem by adding dummy process and replacing element. Repeating matching in this way, many routes of process can be obtained.
企业将不断地把资产和工序从有形领域转移到虚拟领域。
Enterprise will continuously transfer asset and process from visible field to virtual field.
另外，虚拟结构的所有部件必须在同一个工序。
In addition, all components of the phantom structure have to be linked to the same operation.
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