存在设备有关延迟约束的综合调度算法

An integrated scheduling algorithm with device dependence deferred constraint

针对目前综合调度中没有考虑设备有关延迟约束（DDC）影响调度效果的问题，提出了存在设备有关延迟约束的综合调度的算法。该算法在标准工序、设备有关延迟工序（DDP）和包含设备有关延迟约束的加工工艺树等概念的基础上，将等待延迟时间转化为设备有关延迟工序，使存在DDC的调度问题转变为较易解决的一般综合调度问题，再用拟关键路径法（ACPM）确定工序的调度次序，最后用前沿贪心规则确定工序的开始时间。为了使设备有关延迟工序影响的工序尽早开始，进一步提出了设备有关延迟工序配合调整的策略。实验表明，该调度算法能够有效解决存在设备有关延迟约束的综合调度问题，可在不提高算法复杂度的前提下，提高调度结果的精度并减少产品总的加工时间。

Aiming at the problem that the present integrated scheduling ignores the device-dependent deferred constraint （DDC） thus the scheduling result is affected, an integrated scheduling algorithm with the device-dependent def- erred constraint is proposed. On the basis of the concepts of standard procedure, device-dependent deferred proce- dure （DDP） and the processing tree with the device-dependent deferred constraint, the algorithm converts the wait- ting delay time into the device-dependent deferred procedure, thus the scheduling problems with the device-depend- ent deferred constraint are converted into the general integrated scheduling problem being easy to solve. Then, the order of the procedures is determined by the allied critical path method （ ACPM）, and the start time of procedure is determined by the forward greedy rule. The strategy for device-dependent delay procedure cooperating adjustment is proposed to make affected standard procedures start early. The experimental results show that the proposed algo- rithm can solve the integrated scheduling problems with device-dependent deferred constraint. The scheduling result is more accurate, and the total processing time is reduced without increasing the algorithm complexity.