常规的模具制造工艺规划系统只是从工件的角度编制工艺，忽略了工件加工过程中的工序相关性，从而影响了车间作业优化调度的可行性和合理性。
In traditional processing, the technology is made according to the work piece and procedure relativity is ignored, so that feasibility and rationality are both affected.
相关性用来利用应用程序级数据处理特定的实例，例如根据员工序号审批某人的旅行请求。
Correlation is used to address specific instances using application level data, such as the travel approval request of a person based on employee serial number.
进一步提出在经典的车间作业计划析取图模型中，通过加入相关弧以表示工序的相关性。
Then the mathematical description of operation relativity is given systematically from algebraic specification, Gantt chart expression and type conversion.
进一步提出在经典的车间作业计划析取图模型中，通过加入相关弧以表示工序的相关性。
Then the mathematical description of operation relativity is given systematically from algebraic specification, Gantt chart expression and type conversion.
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