具有存储器的串行生产线是一典型离故事件动态系统．本文在其极大代数上线性状态方程的基础上，定义了关键路径，并研究了关键路径的特性．通过关键路径，给出了其扰动分析方法．

Based on the linear state-equations over max-algebra of discrete event dynamic system, the definition of critical path of serial Production lines is given, and by using this concept the problem of parameter pertubation has been investigated.