Showing papers by "Hiroshi Morita published in 1998"
01 Jan 1998
TL;DR: A new configuration of manufacturing system, named High Volume Flexible Manufacturing System (HV-FMS), consists of machining centers arranged in a serial and parallel manner, which attains the high flexibility for the high volume production.
Abstract: We propose a new manufacturing system for agile manufacturing. It is necessary for an agile manufacturing system to produce a large amount and many kinds of products with high reliability. We propose a new configuration of manufacturing system, which attains the high flexibility for the high volume production. The system, named High Volume Flexible Manufacturing System (HV-FMS), consists of machining centers arranged in a serial and parallel manner. It is also expected to ensure high productivity for the case of machine troubles. Simulation studies are performed to demonstrate the feasibility and the effectiveness of the proposed system.
10 citations
01 Aug 1998
TL;DR: A model to estimate the economical behavior of HV-FMS and flexible transfer line is developed and under several demand patterns which have been generated from historical data, both models are simulated to evaluate the effectiveness of Hv-F MS from an economical view point.
Abstract: We focus on the economical aspect of a high-volume flexible manufacturing system (HV-FMS) for agile manufacturing. We develop a model to estimate the economical behavior of HV-FMS and flexible transfer line. Under several demand patterns which have been generated from historical data, both models are simulated to evaluate the effectiveness of HV-FMS from an economical view point.
3 citations
TL;DR: In this article, the authors propose an auction-based method to assign jobs and tools to machining centers using an auction method, where each machining center makes a decision autonomously.
Abstract: For the efficient operation of flexible manufacturing system, it is important to assign the jobs and tools to machining centers taking into account of their interrelations. In this study, we propose an algorithm to assign jobs and tools to machining centers using' an auction method, where each machining center makes a decision autonomously. We realize the load balancing among the machining centers and decrease the job transportation and the number of assigned tools.
2 citations
Proceedings Article•
18 Jan 1998
2 citations
TL;DR: In this paper, the problem of multifunction worker assignment in U-shaped production lines is considered as a multi-objective optimization problem where three objectives are pursued in a preemptive fashion.
01 Jan 1998
TL;DR: In this paper, a method for the acquisition of scheduling rules by using inductive learning from given cases and applying the obtained rules to job shop problems, thus minimizing makespan, was proposed.
Abstract: In manufacturing activities, it is becoming increasingly important to develop automated scheduling systems as the production stages in factories become more complicated. Intelligent scheduling systems, which automatically acquire heuristics, are one practical method of solving this problem and therefore have been studied. The authors have proposed a method for the acquisition of scheduling rules by using inductive learning from given cases and applying the obtained rules to job shop problems, thus minimizing makespan. This paper extends the authors' previous work to job shop problems with due date and describes a method for the refinement of obtained rules. Additionally, numerical experiments show the applicability and effectiveness of the obtained rules by applying them to the exploration process of tabu search.