Planning and control of engineering changes in manufacturing systems

公司必须在其制造系统中实施越来越多的工程变更（EC），以不断提高生产率并对不断变化的需求做出反应。这是保持其竞争力和能够为不同市场生产多样化产品所必需的。产品多样化的增加，由于不断变化的市场需求和提高生产力的目标的适应，导致越来越多的必要的电子商务在制造系统。可用于规划和实施电子商务的时间因其数量众多而日益减少。因此，要么是可执行的EC较少，要么是规划和执行的质量不足。如果能够实施的EC数量减少，则必须实施的EC数量将会增加。因此，所需的生产力改进和调整没有得到实施。质量不足的EC计划也会导致同样的效果。它们必须重新规划，而且是无效的。如果不能实现所需的适应和提高的生产率，则将需要进一步的EC，问题将增加。为了解决这一问题，研究一种新的制造系统电子商务计划与控制方法是本课题的基础工作。这将通过一个三步骤的方法来实现。第一步是确定电子商务的优先次序。在确定优先级之后，在第二步中对EC进行规划。因此，将考虑哪些资源是必要的，以及如何规划EC，以减少生产停工。第三步是控制制造系统中EC的方法。由于维护资源中断或进度延迟等影响，可能需要快速规划调整。为了快速确定所需的调整，生产，EC和生产目标是不断调查。这一办法能够有效地实施电子商务，并确保实现必要的调整和提高生产力。

Companies have to implement an increasing number of Engineering Changes (EC) in their manufacturing systems in order to continuously improve their productivity and to react on changing requirements. That is necessary to maintain their competitiveness and to be able to manufacture diversified products for different markets. The increasing product diversification, the adaptation due to changing market requirements and the aim to increase productivity are leading to an increasing number of necessary EC in manufacturing systems. The available time to plan and implement EC is decreasing due to their high number. Consequently, either less EC can be implemented or the quality of the planning and the implementation is insufficient. If fewer EC can be implemented the number of EC which have to be implemented will increase. Consequently, the needed productivity improvements and adaptions are not implemented. EC planned with insufficient quality are leading to the same effect. They have to be replanned and are ineffective. If the required adaptions and the increased productivity cannot be achieved, further EC will be needed and the problem increases. In order to solve this problem, the goal of the underlying work is to research a new approach to plan and control EC in manufacturing systems. This will be achieved through a three step approach. The first step is the prioritization of EC. After the prioritization, EC are planned in the second step. Thereby, it will be considered which resources are necessary and how EC have to be planned in order to reduce production shutdowns. The third step consists of a method to control EC in manufacturing systems. Rapid planning adaptations can be required due to influences such as the breakdown of maintenance resources or schedule delays. For a fast identification of required adaptations, the production, EC and production goals are surveyed continuously. The approach enables an efficient implementation of EC and assures that the needed adaptations and the increase of productivity will be achieved.