Research

year 2003 
author Kichang Lee 
Keyword manufacturing system design, process model, Petri net, performance model and optimization, simulation 
Abstract In rapidly changing enterprise environments, frequent design activities of a manufacturing system are required. Manufacturing system design decisions have a long term effect on system performance. Moreover, they are so complex problems that coordination and cooperation among departments are necessary to evaluate and improve design alternatives to support the design process, systemic process modeling function and performance analysis/optimization function should be provided in an integrated manner.

In this research, we suggest a new process modeling technique, called PFN(Product Flow Network), as a substitute of previous modeling techniques such as IDEF0, IDEF3, and the ones used in enterprise modeling frameworks. PFN is a directed graph defined for a part to represent the activities and the relationships among them which are necessary to product the part. Connections among nodes can have AND OR XOR types by which various relationships may be captured.

We adopted lead time and manufacturing costs as performance measures. To predict these performance measures for a given design alternatives, Petri net approach is used. We classified a manufacturing system into closed system and open system. In a closed system, the maximum number of parts that may exist in a system is pre-determined. On the other hand, an open system has no such constraints. Petri net models have been constructed for closed and open systems respectively. In addition, an algorithm has been provided to automatically transform a PFM into a Petri net. Before this transformation, XOR elimination algorithm has been suggested, which makes the transformation procedure easy.

In a Petri net for a closed system, as the size of subjective system increases, the computational capability decreased dramatically. To circumvent this shortage, a consolidation approach, which simplifies a Petri net, has been devised. Experimental results are included which show the feasibility of the consolidation. An open system cannot be modeled as a Petri net completely, because the analysis used Markov chain. In this research only service area of a system modeled by Petri net, and arrival area is considered in performance analysis. This approach is new and proved to be effective by simulation experiments. In addition it provides mathematical functions for average lead time and manufacturing costs. Using this functions, we constructed mathematical formulation to minimize average lead time satisfying given manufacturing costs and to minimize total manufacturing costs given average lead time.

In the formulation, lead time function is nonlinear so that the problems cannot be solved directly by commercial optimizer. We adopted linearization procedure in separable programming. By this procedure, nonlinear function can be linearized, which can be solved optimization package such as ILOG CPLEX. We performed simulation experiments for lead time optimization model and manufacturing cost optimization model to validate the formulation. In the result, the mathematical model proved to generate optimized design alternative effectively.

The methodology suggested in this research would make possible to generate various alternatives and to compute optimize performances in the early stage of manufacturing system design process. A computerized environment for this methodology would be more beneficial in supporting the design activities. 
c PhD 

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번호 c year 제목 author
111 PhD  1995  Design Support System for the Conceptual Design of Manufacturing Databases [13] Kitae Shin 
110 PhD  1991  An Integrated Decision Support System for FMS Planning and Control Problems [11] Seongyoung Jang 
109 PhD  1994  A Study on Design of a Cooperative- Distributed Shop Floor Control System for Computer Integrated Manufacturing [19] Namkyu Park 
108 PhD  1996  An Improved Scheduling Heuristic Based on Batch Splitting Method for The Job Shop Scheduling Problem [4] Hanil Jeong 
107 PhD  1996  A Design Support System for the Process Design of Computer Integrated Manufacturing [2] Chankwon Park 
106 PhD  1997  A Study on the Integration of Process Planning and Scheduling [3] Kidong Kim 
105 PhD  1997  Computer-Aided Synthesis of the Execution Controllers for Workcells in Computer Integrated Manufacturing Systems [18] Sangkyun Kim 
104 PhD  1997  A Study on FMS Design Justification Considering Part Type Selection and Performance Evaluation Hosub Shin 
103 PhD  1997  A Study on the Integration of Loading and Scheduling in Flexible Manufacturing Systems [21] Sangbok Woo 
102 PhD  1999  A Study on Job Shop Scheduling Problems considering Production Capacity Adjustment [16] Daeyoung Chung 
101 PhD  1999  A Study on the Manufacturing System State Based Scheduler using Neural Network and Simulator [20] Kitae Kim 
100 PhD  2002  Flexible Job Shop Scheduling with Multi-level Job Structures [16] Yangja Jang 
» PhD  2003  Process Modeling and Performance Analysis Methodology toward Optimal Design of Manufacturing Systems [30] Kichang Lee 
98 PhD  2004  Ontology Development for e-Business Integration [26] Tai-Woo Chang 
97 PhD  2005  A Study on the Integration of Quality Designing and Process Control in Steel Industry [15] Jonghan Kim 
96 PhD  2005  Performance Analysis and Network Design of Supply Chain for Strategic Decision Making [14] Eoksu Sim 
95 PhD  2005  Development of an algorithm for multi-plant production plans in a supply chain [50] Sungwon Jung 
94 PhD  2008  A study on integrated production planning and strategic framework in supply chain [15] Haejoong Kim 
93 PhD  2009  A Study for Business Process Improvement Using Real-time Information of Unbalanced Work [19] Jaehyun Kong 
92 PhD  2010  Framework for Integrative SRM System and Collaboration Scorecard [26] Jongkyoung Park 
91 PhD  2007  A Study on MRP Process Improvement in a Grid Enabled APS [2] file Hyoung-Gon Lee 
90 PhD  2010  Enhancing Flexibility and Responsiveness in Sales Order Management [54] Mokmin Park 
89 PhD  2013  Price of Simplicity under Congestion: On the Revenue and Pricing Schemes in the Telecommunication Industry [58] file Dongmyung Lee 
88 PhD  2013  A study on production scheduling problems considering differential electricity pricing and distributed generations Jun Young Moon 
87 PhD  2014  Multi-level job scheduling in a flexible discrete-part production environment Hong Bum Na 
86 PhD  2014  A study on integrative decision-making system for reconfigurable manufacturing cells Jin Wu Seo 
85 MS  1994  A Study on Distributed Shop Floor Control of Flexible Manufacturing Systems [4] Daeyoung Chung 
84 MS  1994  A Study on Development of a Knowledge Based Scheduler and Knowledge Acquisition through Simulation [1] Kitae Kim 
83 MS  1995  A Study on knowledge Acquisition for Simulation-based Scheduling Expert System [1] Soohyun Lee 
82 MS  1995  A study on intelligent dispatching strategy in Automated Manufacturing Systems [5] Seongwoo Lee 
81 MS  1988  A Simulation Study on Operating Rules of FMS Considering Tool Change Byunghoon Yoo 
80 MS  1988  Development of a Classification and Coding System through Fuzzy Sets Approach [1] Namkyu Park 
79 MS  1988  A Study on The Machine-Part Group Formation for FMS Planning and Operation Jaeyoon Kim 
78 MS  1989  A Study on the Computer and Database Location of Distributed Computer Systems in FMS [1] Kilsup Yang 
77 MS  1989  An FMS Planning Algorithm Considering Tool Magazine Capacity and Alternative Routings [6] Chankwon Park 
76 MS  1989  A Mathematical Decision Making Model for Real-Time Scheduling of an FMS Jonghan Kim 
75 MS  1995  An Object-Oriented Framework for the Implementation of Distributed Shop Floor Control in FMS [2] Kyungsuk Lee 
74 MS  1995  A study on Real-Time Collection of Shop Floor Data Using Speech Recognition [2] Namjoo Kim 
73 MS  1995  A Study on the Group Scheduling Problem with Sequence-dependent Set-up Times in a Multi-stage Cellular Manufacturing Systems Jaesoo Shim 
72 MS  1990  A Fuzzy Linguistic Approach to the Part Selection Problem in FMS [1] Yoosuk Hong 
71 MS  1990  A Study on Data Allocation Problems for Distributed Database Design [2] Kitae Shin 
70 MS  1991  A Study on Scheduling Problem of Hierarchically Structured Products in FMS [1] Hanil Jeong 
69 MS  1991  A Study on Performance Evaluation of Production Plan for FMS Using Queueing Network [1] Sangbok Woo 
68 MS  1991  A Study on the Layered Architecture for the Control of FMS Cells Hosub Shin 
67 MS  1991  A Study on Image Processing and CAD - Vision System Interface of Manufactured Parts [1] Kidong Kim 
66 MS  1992  A Study on Production Planning Problems in a Flexible Machining and Assembly System [1] Sukang Lee 
65 MS  1992  Event-Driven On-Line Operational Control of Flexible Manufacturing Systems Jonghun Park 
64 MS  1992  A Decision Support System for A Machine Specifications in Design of An FMS [6] Youngkwan Ko 
63 MS  1993  A Study on the Computer-Aided Process Planning for Rotational Parts Considering Machine Status [1] Sungbum Chun 
62 MS  1993  A Comparative Analysis of Production Control Policies under Production Uncertainty [5] Janghan Lee