Study And Application Of The JIT-based Manufacturing Monitor System In Machining Workshop

According to the investigation and analysis of the departments, especially of the machining workshop in XX Co., Ltd., the paper puts forward the job-running mode based on Just-in-Time (JIT) mode to create the JIT-based Manufacturing Monitor System (JMMS), which is one of core subsystems of Lean Production Management System (LPMS). The purpose of JMMS is to monitor the progress production of every product's parts in the machining workshop.In the beginning of this paper, a general analysis is conducted on the theory, research status and development trend of JIT mode and its practical significance to enterprise is specified. Then the workshop job management model of XX Co., Ltd. and the disadvantages of the previous system are summarized after analyzing the workshop job management means. To avoid these disadvantages, the production schedule monitor means based on JIT is researched. After these, the paper describes the hardware architecture and the software operating model of JMMS which is composed mainly by Workshop Job Management Module, Field Data Collection Module and Manufacturing Monitor Module. Subsequently, workload assignment algorithm and procedure plans generation algorithm based on JIT which is the core part of the Workshop Job Management Module are mainly researched. The process of generating procedure plans is the process of production static scheduling during which the processing orders and the processing duration of every parts of the product are figured out by using the data of production tasks, production capability and processing routes. In the part of system implementation, requirement analysis and function modeling for the system are done by using Unified Modeling Language (UML); the database of the system is designed by using Power Designer. JMMS is developed based on Browser/Server (B/S) architecture using JAVA Enterprise Edition (JEE). In the end, the application and running examples of the system are given, conclusions and summaries are made, suggestions and plans for the future work are proposed.At the present, JMMS has been put into test run in XX Co., Ltd., and is in a good state.