• IE interfaces
• /
• v.16 no.2
• /
• pp.211-221
• /
• 2003

This paper introduces a simulation study regarding the design for the installation of Color Rescheduling Storage (CRS) in an automobile factory. In the painting shop the colors of vehicles are changed frequently according to the assembly schedule. When the color of a vehicle is changed from one to another, the cleaning process of painting-gun is necessary and it generates costs. Therefore many of the automobile manufacturers equip the CRS in front of the Top Coat Booth of the painting shop. The major objective of CRS is to reduce the change over cost in the painting process by grouping vehicles having same color. In this paper the configuration of CRS and the input/output algorithms are explained. The suggested system is verified using simulation models and experiments are conducted. Finally the best alternative is suggested by sensitivity analysis and evaluation of investment feasibility.

• Proceedings of the Korea Society for Simulation Conference
• /
• 2004.05a
• /
• pp.77-82
• /
• 2004

자동차 공장에서의 생산스케줄은 차체공장에서부터 시작되는데 가장 이상적인 생산스케줄은 차체공장의 생산스케줄이 최종 조립라인의 조립스케줄과 동일하게 구성이 되는 것인데 차체공장, 도장공장, 조립공장의 생산 방식이 서로 다르므로 각각의 생산스케줄 목표에 맞게 투입순서를 조절해야 한다. 이를 위해서 WBS(White Body Storage), CRS(Color Rescheduling Storage), PBS(Painted Body Storage)라는 세 개의 주요 완충공간을 이용한다. 본 논문에서는 시뮬레이션 사례연구를 통하여 CRS와 PBS의 효율적인 운영을 위해 전용레인 설치를 검토하였다. 그 결과 전용레인을 설치하였을 경우 CRS에서는 그룹화비율이 감소하고, 동시에 회송차량이 증가하므로 효과적인 방법이 아님을 알 수 있었다. PBS에 전용레인을 설치한 경우에도 접근금지조건을 위반하는 차량과 회송차량이 증가하여 효율적이지 못함을 알 수 있었다.

• Journal of the Korea Society for Simulation
• /
• v.18 no.3
• /
• pp.147-154
• /
• 2009

In this study we investigate the problem of reducing color change cost at painting operations in an automobile assembly plant. Changing control logic at conveyor junction points prior to the top coat line has been proposed and analyzed using the discrete event simulation model we developed using AutoMod. We also discussed the project which initiated this research as well as the details of painting operations. Simulation analysis showed that the grouping ratio increases from 1.8 to 2.5 if the proposed control logic change is applied to the plant. Contrary to other approaches such as using dedicated equipment for resequencing, our approach has the merit of less investment cost, no need for additional space consumption. We finally note that the grouping ratio can be further increased if our algorithms is implemented as well as CRS (Color Rescheduling Storage) is installed.