The sales contract is the important production information of manufacturing firm, it includes the attribute of the user request, specification and delivery time and the information which enterprise formulation and in the execution productive plan process involves. The Manufacturing firm and user's link are connected by it. In the Manufacturing firm, the contract schedule must be formulated between Master Production Schedule and Production Schedule. Contract schedule must guarantee that all duties in the Master Production Schedule are completed and that production schedule arranges well production as schedule in each contract. Contractschedule is the refinement of the Master Production Schedule. To make the enterprise interior operation be Consistent, its function is not only Communication between inside and outside, but also reducingthe contradiction and the errorbetween the Sale branch and Production department.
Manufacturing industry enterprise's contract management includes management completed in ERP system and independent management system. The two kinds of systems have some Weaknesses such as incomplete information record, not thorough integrations with other systems and weak analysis ability. It is disadvantageous to enterprise's informationization construction and influences seriously on enterprise market reaction rate and market competition ability, which is more obvious to the large-scale manufacturing companies that have complex products than others.
On the foundation of contract management information flow is studied, contract management information system's frame having complete information is designed, and sales and the production forecast method according to the data mining technology and client management's theory is proposed. The corresponding system has been developed. The system core goal is that a transformation to production schedule and job instruction is made, and that market demand is mapped in the manufacturing promptly and accurately to enhances the enterprise’ reaction capacity to the market and enterprise's competitive ability.
销售合同是制造企业的重要生产信息，它包含了用户的要求、技术条件和交货时间的属性，以及企业制定和执行生产计划过程中涉及的信息。制造企业和用户的关联就是由它连接的。在制造企业中，合同进度必须在主生产计划和生产计划之间制定。合同进度必须确保在主生产计划中的所有职责都得以完成，并确保生产计划按每个合同中的时间表安排好生产。 合同进度是主生产计划的细化。为了使企业的内部运行始终如一，它的功能不仅是沟通内外，还能减少销售部门和生产部门之间的矛盾和差错。
制造业企业的合同管理包括在ERP（企业资源计划）系统和独立的管理系统中完成的管理。这两种系统有一些缺点，如信息记录不完整，其他系统的整合不彻底，以及分析能力较弱。这不利于企业的信息化建设，并会严重影响企业的市场反应速度和市场竞争力，这对具有复杂的产品结构的大型企业来说比其他企业更为明显。
在合同管理的基础上，我们研究了信息流，设计了拥有完整信息的合同管理信息系统的框架，并提出了根据数据挖掘技术和客户管理的理论的销售和生产预测方法。相应的系统已被开发。该系统的核心目标是对生产计划和作业指令做出转变，以及将市场需求市场及时和精确地映射到制造上，以增强企业对市场的反应能力，以及企业的竞争能力。
