现有的企业生产计划与控制系统已不能满足虚拟企业环境下的需求，如自治性、分布性、动态性与异构性。
Concurrent enterprises production planning and control system can't meet the requirements of virtual enterprises environment, such as autonomy, distribution, dynamics and heterogeneity.
因此，建立合理有效的生产计划与控制系统对于半流程制造企业适应市场需要，以及提高其竞争能力具有重要的意义。
So, it is very important for the semi-process industry to establish effective production plan and control system so as to adapt to market requirement and to improve its competent ability.
该监控系统是建立在通用的过程模型基础之上，它与生产计划与控制系统的日期计划和资源占用计划相类似，支持面向订单和资源的过程观点。
The monitoring sys-tem is based on a general process model and it, analogous to the time plan and resource plan ofa PPC system, supports the view of the order-oriented and resource-oriented process.
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