| Author | Ho Thanh Phong |
| Call Number | AIT Diss. no.ISE-97-02 |
| Subject(s) | Plant layout--Simulation methods
|
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of
Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. ISE-97-02 |
| Abstract | A great deal of research has been done on Multiobjective Optimization and many more studies
have been carried out on Simulation. They, though, have been done on these two
methodologies in isolation from each other. This dissertation is built on the premise that the
efficacy of Multiobjective Optimization and Simulation, when applied as an integrated
methodology is significantly enhanced. This research is aimed at integrating Multiobjective
Optimization into a Simulation environment in the context of a Factory Layout Problem.
The Factory Layout Problem is modeled as a three-objective optimization problem
Maximizing Total Layout Flexibility, Minimizing Total Travel Time, and Maximizing Total
Closeness Rating Scores. Flexibility, as it applies to layout, is based on a new concept of
Reachability. The problem is structured as a Nonlinear Goal Programming model and Genetic
Algorithms are used to derive solutions. The concept of integrated optimization-simulation is
introduced, implemented and applied for the Facility Layout Problem specifically dealing with
layout design. In the integrated model, simulation is treated as a monitoring tool, which
observes and records system performance; optimization module is the driving tool, which
performs evaluation and points out the next alternative for the system. For the layout design
level, the global criterion concept is selected to formulate a fitness function, which minimizes
the sum of the weighted deviations from the individual objectives' ideal values.
The optimization model is then integrated into the Simulation platform of SIMPLE++, an
Object Oriented, and full animation simulator. New simulation blocks are created and
introduced into the overall framework.
The integrated Multiobjective Optimization - Simulation Factory Layout Methodology is then
applied to a specific case of a company in Vietnam. The case study has confirmed the efficacy
of the integrated optimization - simulation methodology in designing the layout of a modern
manufacturing system.
|
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. ISE-97-02 |
| Type | Dissertation |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Tabucanon, Mario T.; |
| Examination Committee(s) | Pastijn, Hugo;Huynh, Ngoc Phien;Shtub, Avraham; |
| Scholarship Donor(s) | The Austrian Government; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 1997 |