MINISTRY OF EDUCATION AND TRAINING HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING INDUSTRIAL MANAGEMENT MODELING AND SIMULATION FOR OPTIMIZATION OF A MATTRESS PRODUCTION LINE BASED ON FLEXSIM SOFTWARE AT DUNLOPILLO (VIETNAM) LTD SUPERVISOR: MBA. NGUYEN DANH HA THAI STUDENT: DO THUY LINH SKL 0 0 8 1 8 6 Ho Chi Minh City, August, 2021 MINISTRY OF EDUCATION AND TRAINING HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING GRADUATION THESIS Topic: MODELING AND SIMULATION FOR OPTIMIZATION OF A MATTRESS PRODUCTION LINE BASED ON FLEXSIM SOFTWARE AT DUNLOPILLO (VIETNAM) LTD Student : Do Thuy Linh ID : 17124047 Year : 2017 Major : Industrial Management Instructor : MBA Nguyen Danh Ha Thai Ho Chi Minh City, August, 2021 INSTRUCTOR’S COMMENTS ---------------------------------------------------------- ---------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- Ho Chi Minh City, day … month … year … Instructor i MEMBER OF THE THESIS COMMITTEE’S COMMENTS ---------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- Ho Chi Minh City, day … month … year … Member of the Thesis committee ii ACKNOWLEDGEMENT The process of completing the graduation thesis is the most important stage in every student's life. It is the hardest time for me because I did present the biggest challenge that I’ve never met with full of efforts. Graduation thesis gives me an opportunity to review all knowledge and skills in four years of university before starting a career.
First of all, I would like to express my sincerity, thanks to teachers of the Faculty for High Quality Training and the Faculty of Economy who always have enthusiastically taught and equipped students with all necessary knowledge and experience. Secondly, I would like to express my gratitude to my instructor Mr. Nguyen Danh Ha who gave me all useful guidance and enthusiastic support. They are very valuable suggestions not only in the process of making this thesis but also as a stepping stone for me in the process of studying and setting up a career in the future.
Finally, thank you to my family and my friends who are always by my side and encourage me to overcome all my hard times. Because of the time limit, the difficulty in approaching such a new researching direction i. Simulation and lack of experience, the thesis cannot avoid mistakes and shortages. Therefore, I am extremely appreciated to receive comments and recommendation from you to help me to complete this graduation thesis as well as possible.
Thank you so much, Best regards. Ho Chi Minh City, 18 August 2021 Student DO THUY LINH iii LIST OF ACRONYMS ACRONYM EXPLANTION Avg Average BN Bonnel (name of the mattress type) DPR Daily Production Report DVL Dunlopillo Vietnam Ltd, MPR Monthly Production Report M&S Modeling and Simulation Pcs Pieces PPR Production Productivity Rate QC Quality Control Qty Quantity iv LIST OF TABLES Table 2. 1 The advantages and disadvantages of four basic layout types. 2 Characteristics of a manufacturing system model.
3 The advantages & disadvantages of Simulation. 1 The working schedule. 2 The average daily yield of mattress production system in third quarter, 2020. 3 The Average Production Productivity Rate per day.4 The demand forecast for 2023.
5 List of machines and processing tables in the mattress production line. 6 Table of processing time of machines and processing tables in the mattress production line. 7 The output of mattress production line - the actual model. 8 Detail state of all objects in the Cover Section – Actual simulation model.
stay time and input/output quantity of all objects in the Cover Section – Actual simulation model. 10 Detail state of all objects in the Spring Section – Actual simulation model. stay time and input/output quantity of all objects in the Spring Section – Actual simulation model. 12 Detail state of all objects in the Finishing Section – Actual simulation model.
stay time and input/output quantity of all objects in the Finishing Section – Actual simulation model. 1 The output of mattress production line - Scenario1 simulation model. 2 Detail state of all objects in the Cover Section – Scenario1 simulation model. stay time and input/output quantity of all objects in the Cover Section – Scenario1 simulation model.
4 Detail state of all objects in the Spring Section – Sncenario1 simulation model. stay time and input/output quantity of all objects in the Spring Section – Scenario1 simulation model. 6 Detail state of all objects in the Finishing Section – Scenario1 simulation model. stay time and input/output quantity of all objects in the Finishing Section – Scenario1 simulation model.
8 The output of mattress production line - Scenario2 simulation model. 9 Detail state of all objects in the Cover Section – Scenario2 simulation model. stay time and input/output quantity of all objects in the Cover Section – Scenario2 simulation model. stay time and input/output quantity of all objects in the Spring Section – Scenario2 simulation model.
12 Detail state of all objects in the Finishing Section – Scenario2 simulation model. stay time and input/output quantity of all objects in the Finishing Section – Scenario2 simulation model. 71 vi LIST OF FIGURES Figure 0. 1 Process of the research deployment.
1 Image of Dunlopillo Vietnam Ltd. 2 Medium End (ME): DUN AUDREY N) MATT 200X180X25CM VN. 3 High End (HE): DUN FIRMREST LUXE MATT 205X193X25CM BS. 4 Very High End (V-HE): DUN CORINA PRE MATT 200X160X35CM (N).
5 DUN LATEX WORLD PURE MATT 200X160X20CM. 6 Factory Organization Chart. 1 Volume and variety characteristics for each process type. 2 The volume – variety characteristics influence the manufacturing layout.
3 The relationship between manufacturing process types and basic layout types. 4 A logo image of Flexsim software. 1 Mattress production process. 2 2D Layout drawing of Spring Section.
3 2D Layout drawing of Cover Section. 4 2D Layout drawing of Finishing Section. 5 3D Logic model of Glue – box station. 6 Setup of the Glue-box table 4’s properties for 3D Logic model.
7 Setup of the PU Sheet queue’s properties for 3D Logic model. 8 Process flow for activities at Glue-box station. 9 Setup parameters for Process Flow Properties. 10 3D model of process flow for Glue – box station.
11 Setup parameters for Source Quilting Top. 12 Setup parameters for Quilting Top machine. 13 The complete existing 3D model of mattress production line. 14 All of process flows for the logic model.
15 State of all objects in the Cover Section Pie chart – Actual simulation model. 16 Average stay time of Semi – Mattress on Queue in the Cover Section Bar chart – Actual simulation model. 17 State of all objects in the Spring Section Pie chart – Actual simulation model. 18 Average stay time of Semi – Mattress on Queue in the Spring Section Bar chart – Actual simulation model.
19 State of all objects in the Finishing Section Pie chart – Actual simulation model. 20 Average stay time of Semi – Mattress on Queue in the Finishing Section Bar chart – Actual simulation model. 1 The 3D model design of the Scenario1. 2 Pie chart of Cover Section – Scenario1 simulation model.
3 Bar chart of Cover Section – Scenario1 simulation model. 4 Pie chart of Spring Section– Scenario1 simulation model. 5 Bar chart of Spring Section– Scenario1 simulation model. 6 Pie chart of Finishing Section– Scenario1 simulation model.
7 Bar chart of Finishing Section– Scenario1 simulation model. 8 The 3D model design of the Scenario2. 9 Pie chart of Cover Section– Scenario2 simulation model. 10 Bar chart of Cover Section – Scenario2 simulation model.
11 Bar chart of Spring Section – Scenario2 simulation model. 12 Pie chart of Finishing Section– Scenario2 simulation model. 69 viii TABLE OF CONTENTS INSTRUCTOR’S COMMENTS .i MEMBER OF THE THESIS COMMITTEE’S COMMENTS. iii LIST OF ACRONYMS .iv LIST OF TABLES.
v LIST OF FIGURES. Reasons for choosing the topic. Objectives of the study. Scope and object of the study.
Object of the study. Scope of the study. Methodology of the study. Structure of the thesis.
3 CHAPTER 1: INTRODUCTION OF DUNLOPILLO VIETNAM LTD. History and development of the company. Manufacturing organization chart. 8 CHAPTER 2: LITERATURE REVIEW.1 Manufacturing process types, basic layout types and the relationship between them 2.1 Types of manufacturing processes .2 The basic layout types.3 The relationship between manufacturing process types and basic layout types .2 Types of bottleneck .3 Bottleneck detection methods .4 Type of data for bottleneck analysis .3 Modeling and Simulation .1 Modeling and Simulation definition .2 The purpose of Modeling and Simulation .3 Modeling of manufacturing system .1 Introduction of Flexsim software .2 Advantages and disadvantages of Simulation.
21 CHAPTER 3: CURRENT PROBLEMS AND THE IMPLEMENTATION OF MODELING & SIMULATION OF THE ACTUAL MATTRESS PRODUCTION LINE .1 Mattress production process description .2 Current problem description .1 Current production perspective .3 Future demand forecast .3 Data collection and analysis .4 Modeling the simulation with Flexsim software .1 Some assumptions of simulation model .2 Steps of modeling .5 Simulation results and analysis .2 Results and analysis .1 Type of output data for analysis .2 Output data analysis. 43 CHAPTER 4: PROPOSAL OF NEW DESIGNS FOR CAPACITY AND EFFICIENCY IMPROVEMENT OF THE MATTRESS PRODUCTION LINE .1 Scenario1 for efficiency improvement of the current mattress production line .1 Design of the Scenario1 .2 Result and analysis of the effectiveness of the Scenario1 .2 Scenario2 for capacity improvement of the mattress production line .1 Design of the Scenario2 .2 Result and analysis of the effectiveness of the Scenario2. Reasons for choosing the topic According to an article by the Industry and Trade newspaper published on October 22, 2019, a study on the mattress market by Mekong Capital indicated that the Vietnamese mattress market has a size of about 1 billion USD with an estimated need of 4 million new mattresses. However, there are still 60% of families that have not used them, so there are still a lot of chances for growth.
The business world predicts that in the future, the mattress market will expand, because the mattress will be an essential item in every Vietnamese family. Currently, Dunlopillo Vietnam focuses on production for export, so it has not really payed attention on the domestic market. However, realizing the potential of the Vietnamese market, in the next two years when the covid19 pandemic will be controlled, the company is going to planning for developing and expanding market share in Vietnam. Additionally, in Indonesia, Dunlopillo is one of two mattress brands which have been being dominant in the mattress market.
Population growth and migration of consumers from rural to urban areas are creating more mattress demand both residential and non – residential segment (e. Therefore, based on the forecast of Sales department, the company also needs to deal with this increase. According the company’s expansion plan, to cope with this problem, Modeling and Simulation has been a profitable method to analyze, assess the current status of the system and modify for improvement. It is able to precisely anticipate the performance of complicated systems, makes it ideally suitable for system planning (Harrell et al.
Application of simulation prevents the company from blindly expanding the scale of production to improve capacity. In this study, Flexsim 2019 which is one kind of simulation software was applied, is a state-of-the-art tool for user to simulate and optimize the production line.