Research

year 2005 
author Jonghan Kim 
Keyword Case-based Reasoning, Integrated System, Quality Designing, Scheduling, Process Control, Steel Industry 
Abstract To cope with the rapid changes in business environment, typical large-scale complex industries such as the steel industry are in the process of building computer integrated production systems to strengthen competitiveness by promoting the flexibility and productivity of the production system. In particular, the promotion of the productivity and flexibility of the production process in the steel industry has been regarded as a core element in effectively meeting changes in the market. Despite such importance, however, few studies have been conducted to promote productivity and flexibility during the process of solving various problems in the steel industry. Promoting productivity and flexibility in the steel industry requires appropriate planning and execution of quality design and process control. The problem is extremely difficult and complicated because not only should the basic restraints in the quality design stage be considered but also the process planning and process capability during the process control stage be taken into account to realize said purposes.


To date, research activities carried out to solve such problems have approached overall problems by segregating them into several stages. However, it still is difficult to obtain an optimal solution even for the segregated problem within a realistic timetable. In addition, it raises yet another problem, i.e., difficulty to set targets that enhance the achievement level in process management during the quality design stage. This study is a result of an effort to develop a structure and solution of an integrated system that can make decisions regarding quality design, scheduling, and process control. At the same time, the solution improves the flexibility of the steelmanufacturing process by integrating and solving problems related to quality design and process management in the steel industry.


The proposed integration system is composed of a structure that solves the entire problem by linking three modules: (1) “quality design generation module,” which creates quality design; (2) “module that maximizes productivity in scheduling,” which considers the alternatives derived from quality design, and; (3) “process control module,” which seeks to achieve the optimum level of accomplishment in the process where the deduced quality design and scheduling are executed.


The quality design formation module presents a solution that creates optimum quality design using the case-based reasoning methodology. This module proposes and uses a fuzzy similarity index and a productivity maximization index to evaluate similar cases. It also presents a solution that can deduce a new alternative plan for quality design according to the requirements of customers, thereby suggesting its superiority as verified through experiments.


The scheduling creation module is based on the formulation of the Bin-Packing problem, which is characterized by several alternative plans for quality design and many customer orders. After developing the corresponding solution, the appropriateness and efficiency of the solution were verified through experiments.



Finally, the process control module seeks to achieve the optimum accomplishment level of the steel-making process where quality design and scheduling are executed. It proposes a forecast module for process control using a case-based reasoning methodology. The application of the model to experimental problems and to real industrial problems proved the superiority of the proposed solution. Moreover, since the process control module may work independently from the quality design and scheduling modules, it can be used effectively in the existing steel industry.



From the experiments, the resulting integrated approach exhibited superiority in terms of the accomplishment level compared to the existing step by step approach. Since the difference tends to increase gradually as the number of alternatives for quality design increases, the integrated approach is found to be more useful in solving actual problems.



This study contributed in raising productivity of the steel industry by integrating and giving solutions to quality design and process control problems of the steel industry, where alternative plans for quality design exist. 
c PhD 

Download :

번호 c year 제목 author
35 MS  1998  Design of Integrated BOM Management System supporting Multiple Views Keumseok Kang 
34 MS  1998  A Study on UML representation of CIM-OSA and availability of analysis and design pattern in CIM-OSA [1] Seungoh Han 
33 MS  1998  A study on an efficient real-time deadlock-free control algorithm by using graph-theoretic approach [27] Jungwoon Yoo 
32 MS  1997  A New Approach to Master Production Scheduling in the MRP environment [1] Sangdo Choi 
31 MS  1997  A Study on FMS Scheduling Problems Based on Priority Functions Generated by Genetic Programming ChangUk Kim 
30 MS  1997  A Scheduling Algorithm Considering Subcontractor and Machine Setup Cost in MRP Environment [1] Kichang Lee 
29 MS  1996  A Study on the Generation and DB Construction of Modular BOM [1] Yonggu Ji 
28 MS  1995  A Study on the Group Scheduling Problem with Sequence-dependent Set-up Times in a Multi-stage Cellular Manufacturing Systems Jaesoo Shim 
27 MS  1995  A study on Real-Time Collection of Shop Floor Data Using Speech Recognition [2] Namjoo Kim 
26 MS  1995  An Object-Oriented Framework for the Implementation of Distributed Shop Floor Control in FMS [2] Kyungsuk Lee 
25 MS  1995  A study on intelligent dispatching strategy in Automated Manufacturing Systems [5] Seongwoo Lee 
24 MS  1995  A Study on knowledge Acquisition for Simulation-based Scheduling Expert System [1] Soohyun Lee 
23 MS  1994  A Study on Development of a Knowledge Based Scheduler and Knowledge Acquisition through Simulation [1] Kitae Kim 
22 MS  1994  A Study on Distributed Shop Floor Control of Flexible Manufacturing Systems [4] Daeyoung Chung 
21 MS  1994  A Finitely Recursive Processes Approach to Modeling and Control of an FMC Jaeheuk Choi 
20 MS  1993  A Supervisory Control Approach to Rapid Implementation of Low-Level Control Software for FMC [1] Sangkyun Kim 
19 MS  1993  A Study on the FMS Shop Floor Control by Bidding among Autonomous Objects Jangsuk Moon 
18 MS  1993  A Study on Effects of Order Release Policies to Performance of Manufacturing Systems Choonghwan Ahn 
17 MS  1993  A Comparative Analysis of Production Control Policies under Production Uncertainty [5] Janghan Lee 
16 MS  1993  A Study on the Computer-Aided Process Planning for Rotational Parts Considering Machine Status [1] Sungbum Chun 
15 MS  1992  A Decision Support System for A Machine Specifications in Design of An FMS [6] Youngkwan Ko 
14 MS  1992  Event-Driven On-Line Operational Control of Flexible Manufacturing Systems Jonghun Park 
13 MS  1992  A Study on Production Planning Problems in a Flexible Machining and Assembly System [1] Sukang Lee 
12 MS  1991  A Study on Image Processing and CAD - Vision System Interface of Manufactured Parts [1] Kidong Kim 
11 MS  1991  A Study on the Layered Architecture for the Control of FMS Cells Hosub Shin 
10 MS  1991  A Study on Performance Evaluation of Production Plan for FMS Using Queueing Network [1] Sangbok Woo 
9 MS  1991  A Study on Scheduling Problem of Hierarchically Structured Products in FMS [1] Hanil Jeong 
8 MS  1990  A Study on Data Allocation Problems for Distributed Database Design [2] Kitae Shin 
7 MS  1990  A Fuzzy Linguistic Approach to the Part Selection Problem in FMS [1] Yoosuk Hong 
6 MS  1989  A Mathematical Decision Making Model for Real-Time Scheduling of an FMS Jonghan Kim 
5 MS  1989  An FMS Planning Algorithm Considering Tool Magazine Capacity and Alternative Routings [6] Chankwon Park 
4 MS  1989  A Study on the Computer and Database Location of Distributed Computer Systems in FMS [1] Kilsup Yang 
3 MS  1988  A Study on The Machine-Part Group Formation for FMS Planning and Operation Jaeyoon Kim 
2 MS  1988  Development of a Classification and Coding System through Fuzzy Sets Approach [1] Namkyu Park 
1 MS  1988  A Simulation Study on Operating Rules of FMS Considering Tool Change Byunghoon Yoo