Study on a creation of supply chain management based on the JIT principle

当前的个人计算机超过了上一代超级计算机的性能，包括Internet在内的网络技术正在迅速发展。信息技术（IT）的这场革命极大地降低了信息成本，并且现在可以容易地收集和利用诸如生产点（POP）和销售点（POS）处的信息的公司范围或世界范围的信息。在这种情况下，我们发展了我们以前的研究，准时制（JIT）生产系统的演变，试图创建一个供应链管理（SCM）的基础上，准时制原则。这充分利用了IT技术，通过在公司之间共享信息，跨越边界，涉及所有流程，如零件和原材料采购，生产，分销和销售，以达到客户，并旨在实现整体优化。以下四点是通过本研究获得的结果.我们改进了以往研究中提出的神经元动态规划（DP）算法SBMPIM，使其能够求解大规模问题.通过模拟优化调整拉式生产系统的参数，将看板、基本库存、连续生产、混合生产和广义看板等拉式生产系统的单位时间期望总成本与SBMPIM计算的单位时间期望总成本进行了数值比较。其次，我们考虑好的拉动系统的控制律是否可以应用于基于JIT原则的供应链，并通过使用RFID将它们应用于基于JIT原则的供应链.对混合装配线和U型线进行了理论分析，并提出了其生产线的优化算法.我们对东海地区的汽车制造企业的外包情况进行了调查，明确了其与制造业龙头企业的关系，以及影响这些企业引进RFID的因素。

The current personal computers surpass the performance of the older generation supercomputers and the network technology including Internet is progressing rapidly. This revolution of Information Technology (IT) dramatically reduces the information cost and the company-wide or world-wide information such as information at the Point Of Production (POP) and at the Point Of Sale (POS) now can be easily collected and utilized. In these circumstances, we develop our previous studies on the evolution of Just In Time (JIT) production system to attempt to create a Supply Chain Management (SCM) based on the JIT principle. This utilizes IT fully by sharing of information between companies, corporations across the border concerning all processes such as parts and raw materials procurement, production, distribution and sales to reach customers, and aims to attain an overall optimization. The following four points are the results obtained through this study.1. We improve the neuro Dynamic Programming (DP) algorithm SBMPIM developed already in our previous studies to solve the large-scale problems.2. The expected total costs per unit time of pull production systems, whose parameters are optimally adjusted by simulation, such as the Kanban, Base stock, CONWIP, Hybrid and Generalized kanban systems are numerically compared with the expected total costs per unit time computed by the SBMPIM mentioned above. Next, we consider whether the control laws of good pull systems can be applied to the SCM based on the JIT principle and apply them to the SCM based on the JIT principle by using the RFID.3. Mixed-item assembly lines and U-shaped lines are analyzed theoretically and optimization algorithms of their production lines are developed.4. We did the survey of outsourcing for Tokai region's automotive manufacturing companies and clarify its relationship with manufacturing leaders and factors affecting the introduction of RFID to those companies.