The Research on Scheduling Systems in CIM for Shipbuilding

不用说，工艺规划和调度的大量信息对于生产活动非常重要。因此，随着计算机技术的进步，日本造船厂在生产计划和调度系统的开发方面做了大量的工作。由于工厂中存在各种限制，因此必须考虑这些限制来规划最有效的生产计划。然而，生产调度处理的信息是巨大的，它是非常困难的计划最佳的时间表。因此，生产排程是需要技巧的，在本研究中，为了将制程规划系统与排程系统整合，我们开发了以产品模型为基础的生产排程系统。(1)运营模式我们可以理解交换活动是船厂生产的核心活动 ...更多信息 .这种活动是为了交换材料和中间产品的形状。我们可以理解，运输活动和停滞活动的存在是为了将两个或两个以上的交换活动顺利地连接起来。在本研究中，我们介绍了这两种类型的活动。一个是“流程操作”，另一个是“任务”，以制定造船生产计划。“流程操作”和“任务”是在船厂操作中操作的模型。开发了船厂生产调度支持系统。(2)产品模型利用我们已经开发的造船CIM原型系统，对产品对象的表达进行了研究。我们通过在设计阶段设计的分组零件来表达中间产品的信息。这些信息将作为产品模型生成。此外，我们可以确认熔接痕信息的重要性。(3)工厂模型和工厂模拟器在本研究中，我们介绍了工厂模型。“工厂模型”是造船厂的模型。在此基础上，利用Petri网技术开发了工厂仿真系统.我们可以计划的操作计划和模拟的操作流程在船厂。少

It is needless to say that a lot of information on process planning and scheduling are very important for production activities. Therefore a lot of efforts have been conducted to develop systems for production planning and scheduling in Japanese shipyards with the advancement of computer technology.Because there are various restrictions in the factory, most efficient production schedule must be planned in consideration of those restrictions. However, information handled by production scheduling is huge and it is very difficult to plan the best schedule. Therefore, skill is needed for production scheduling.In this research, to make the process planning system and the scheduling system integrated, we develop the production planning system which is based on the product model.The outline of the content of the finding and the research obtained for this research is shown as follows.(1) Operation ModelWe can understand that the exchange activity is the core activity in production of shipyards … More . This activity is for the exchange the shape of a material and intermediate products. We can understand that the transportation activity and the stagnation activity exist to connect two or more exchange activities smoothly. In this research, we introduce the two types activity. One is 'Process Operation', another is 'Task', in order to develop production planning for shipbuilding. 'Process Operation' and 'Task' are models which operate in shipyard operation. We develop the production scheduling support system in the shipyard.(2) Product ModelBy using the prototype systems of shipbuilding CIM which we had already developed, we research on the expressions of production objects. We express the information on the intermediate products by the grouping parts that are designed on the design stage. This information are generated as the Product Model. Moreover, we can confirm the importance of information on the weld lines.(3) Factory Model and Factory SimulatorIn this research, we introduce the Factory Model. 'Factory Model' is a model of shipyard. And more, we develop the Factory Simulator system by using the Petri Net. We can plan the operation schedules and simulate the operation flows in shipyards. Less