VIETNAM NATIONAL UNIVERSITY OF HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY NGUYEN THUY LINH IMPLEMENTATION OF DMAIC METHODOLOGY FOR REDUCING THE SCRAPPED MATERIALS IN AN ADHESIVE MANUFACTURING COMPANY Major: Industrial Engineering Major ID: 8520117 MASTER’S THESIS HO CHI MINH CITY, January 2024 THIS RESEARCH IS COMPLETED AT: HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY – VNU HCM Instructor 1: Assoc. Do Ngoc Hien Instructor 2: Assoc. Le Ngoc Quynh Lam Examiner 1: PhD. Do Thanh Luu Examiner 2: PhD.
Nguyen Duc Duy Master’s Thesis is defended at HCMC University of Technology, VNU-HCM on January 27, 2024. The Board of The Master’s Thesis Defense Council includes: 1. Nguyen Vang Phuc Nguyen 2. Le Song Thanh Quynh 3.
Counter-Argument Member: PhD. Do Thanh Luu 4. Counter-Argument Member: PhD. Nguyen Duc Duy 5.
Council Member: PhD. Duong Quoc Buu Verification of the Chairman of the Master’s Thesis Defense Council and the Dean of the Faculty of Mechanical Engineering after the thesis is corrected (if any). CHAIRMAN OF THE COUNCIL DEAN OF FACULTY OF MECHANICAL ENGINEERING ii VIETNAM NATIONAL UNIVERSITY HCMC SOCIAL REPUBLIC OF VIETNAM VNUHCM UNIVERSITY OF TECHNOLOGY Independence – Liberty – Happiness MASTER’S THESIS ASSIGNMENTS Full name: NGUYEN THUY LINH Learner ID: 2170626 Date of birth: April 01, 1998 Place of birth: Thanh Hoa Major: Industrial Engineering Major ID: 2070335 I. TITLE: IMPLEMENTATION OF DMAIC METHODOLOGY FOR REDUCING THE SCRAPPED MATERIALS IN AN ADHESIVE MANUFACTURING COMPANY / NGHIÊN CỨU THIẾT KẾ GIẢI PHÁP GIẢM SỐ LƯỢNG VẬT LIỆU HUỶ TRONG CÔNG TY SẢN XUẤT KEO DÁN CÔNG NGHIỆP II.
ASSIGMENT AND CONTENT - Research to apply DMAIC cycle into operation, production process and material monitor in an Adhesive Manufacturing Company. - Determine potential root causes creating scrapped materials. - Recommend actions and control plans to optimize process and monitor the quantity of scrapped materials. ASSIGNMENT DELIVERING DATE: September 04, 2023 IV.
ASSIGNMENT COMPLETING DATE: December 18, 2023 V. Do Ngoc Hien - Assoc. Le Ngoc Quynh Lam Ho Chi Minh City, January 27, 2023 INSTRUCTOR 1 INSTRUCTOR 2 HEAD OF DEPARTMENT DEAN OF FACULTY OF MECHANICAL ENGINEERING iii ACKNOWLEDGMENT If my youth is a long journey, HCMC University of Technology would be the best wonderful destination. Some people said that Bach Khoa was a mistake of their youths, but from the depth of my mind, it still was a mistake, but was sweetest fault in my life.
In this university, I had chances to meet my friends and my teachers, who are always ready to listen to my problems and give me a hand whenever I have troubles. And also in this university, it taught me that difficulties and challenges are set to us to try best to overcome instead of ceasing us succeed. The thesis namely “Implementation of DMAIC methodology for reducing the scrapped materials in an adhesive manufacturing company” likes a milestone marking my success in applying all of knowledge I have learned two years into practice. In order to complete well my thesis, I was lucky to receive help from school, my teachers and my colleagues.
First of all, I would like to send respectful greetings and honest thanks to teachers in the Department of Industrial System Engineering. Concerns, thorough instructions and kind helps from lecturers are important things supporting me to finish the thesis successfully. Especially, I would like to express my endless thanks and gratefulness to my instructor Assoc. Do Ngoc Hien and Assoc.
Le Ngoc Quynh Lam. My teachers always are devoted to instructing and take care of me during the research period, and their sound advices like magnetic needles for me to go on the right way. Without their motivation and instruction, the thesis would have been impossible to done effectively. On top of that, not only did they teach us valuable lessons, but also shared useful skills and working experiences in the daily life, which helped me grow better and avoid mistakes when working in any companies in the future.
iv My special thanks devote to my family for their endless love, care and have most assistance and motivation me for the whole of my life. I also would like to express my thanks to my friends for their support and care me all the time. Because of the time limitation as well as my limited understanding, this work still has several shortcomings. I hope that I will receive suggestions as well as instructions from teachers to complete and improve better.
Ho Chi Minh, Dec 18th, 2023 Student Nguyen Thuy Linh v ABSTRACT Currently, to survive and thrive economy in a highly competitive market, business not only constantly build effective strategy of increasing production efficiency, improving quality and reducing defect rates, but also do pay more attention on meeting customer requirements. In recent years, sustainability development has become a priority that most of companies aim for. As one of organization which has defined importance of sustainability factors in getting more market shares, Adhesive Technology Vietnam Company have conducted projects to created eco-friendly products or reduce wastes disposed into environments. However, according to data recorded in the 2021-2022 period, yearly average quantity of scrapped material is still high and alarmed.
It is indicated that there are some problems leading to waste in supply and production process. DMAIC is well-known methodology to eliminated waste, improve product quality and increase production efficiency. This study followed a structure Define, Measure, Analyze, Improve and Control approach to address the high quantity of scrapped materials. Reasons causing high scrapped quantity have been classified and analyzed into four clues such as expiry, weak control methods in Internal warehouse and Cool warehouse, and Quality Issue happened for the highest consumed product – AQUENCE GL 92 ETICOL.
The achievement pointed out improvement in building work instruction and set up critical control points, which brought positive results. As the results, this study helps company significantly reduce quantity of waste generated from approximately 70.5 tons in 2022 to about 50.6 tons updated until November 2023. In conclusion, according to collected results, it is proved that DMAIC cycles brought benefits and supported company to achieve the set-up target – reducing scrapped materials in the process to contribute to strategy of sustainability development. vi TÓM TẮT LUẬN VĂN Hiện nay, để tồn tại và phát triển trong nền kinh tế mang tính cạnh tranh cao, các doanh nghiệp không chỉ tập trung vào việc xây dựng các chiến lược nâng cao hiệu quả sản xuất, cải tiến chất lượng, giảm tỷ lệ hàng lỗi mà còn tìm cách đáp ứng các yêu cầu từ khách hàng.
Trong những năm gần đây, phát triển bền vững đã và đang trở thành những ưu tiên hàng đầu mà các công ty hướng tới. Là một trong những tổ chức nhận ra sự quan trọng của chiến lược phát triển bền vững trong viêc nâng cao thị phần, Công ty Sản Xuất Keo Dán Công Nghiệp Việt Nam đã tiến hành những dự án để tọa ra những sản phẩm thân thiện môi trường hoặc giảm số lượng hàng thải ra môi trường. Tuy nhiên, theo dữ liệu ghi lại năm 2021-2022, số lượng hàng hủy trung bình hàng năm vẫn ở ngưỡng cao và báo động. Điều này đã chỉ ra rằng vẫn đang có nhiều vấn đề tồn đọng gây ra những lãng phí, hàng hủy trong quá trình sản xuất và cung ứng sản phẩm.
DMAIC được biết đến là một chu trình nhằm giảm lãng phí, cải tiến chất lượng sản phẩm và nâng cao hiệu quả sản xuất. Nghiên cứu đã áp dụng cách tiếp cận của từng pha Xác định, Đo lường, Phân tích, Cải tiến và Kiểm soát để giải quyết vấn đề tỷ lệ hàng hủy cao. Những nguyên nhân gây ra khối lượng hàng hủy lớn được phân tích và phân loại thành bốn manh mối như sau: hàng hóa hết hạn, hàng hóa không được kiểm soát tốt trong Kho Nội Bộ, hàng hóa không được kiểm soát tốt trong Kho Ngoài, và sản phẩm có vấn đề chất lượng – AQUENCE GL 92 ETICOL. Những phương án cải tiến thông qua xây dựng hướng dẫn công việc, thiết lập điểm kiểm soát trong sản xuất đã đem lại những thành tựu đáng kể trong nghiên cứu này.
Cụ thể, nghiên cứu đã giúp công ty giảm khối lượng hàng hủy từ khoảng 70.5 tấn trong năm 2022 xuống còn khoảng 50.6 tấn ghi nhận vào tháng 11 năm 2023. vii Tóm lại, theo những dữ liệu thu nhập được, luận văn đã chứng minh chu trình DMAIC đã mang lại những lợi ích và giúp doanh nghiệp đạt được mục tiêu đặt ra ban đầu – giảm khối lượng hàng hủy tạo ra để đóng góp vào chiến lược phát triển bền vững. viii DECLARATION OF AUTHORSHIP I hereby declare that this thesis with topic “Implementation Of DMAIC Methodology For Reducing The Scrapped Materials In An Adhesive Manufacturing Company” was carried out by myself and the work contained and the results in it are true by author and have not violated research ethics. The data and figures presented in this thesis are for analysis, comments, and evaluations from various resources by my own work and have been duly acknowledged in the reference part.
I will take full responsibility for any fraud detected in my thesis. Ho Chi Minh City, December 18, 2023. Nguyen Thuy Linh ix LIST OF CONTENT CHAPTER 1.4 Scope and limitation .1 Overall about research object 11 4.2 Overall procedure of materials flows 12 4.3 Get Data Clues 21 4.1 Analyze root causes for high quantity of expired materials.2 Analyze root causes for high scrapped of materials stored in Internal warehouse (5016) 31 4.3 Analyze root causes for high scrapped of materials stored in Cool warehouse (S5P6) 33 4.4 Analyze root causes for high scrapped of Product 1338923 - AQUENCE GL 92 ETICOL 35 4.5 Improvement Plan Proposal 37 4.1 Build up standard operating procedure 38 4.2 Setup Critical Control Point (CCP) in process 46 4.2 Product quality control plan 54 CHAPTER 5. CONCLUSIONS AND SUGGESTIONS.
Statistic of Scrapped Materials in 2022. Taguchi Design and collected experimental results. Statis of Scrapped materials after improvement. Handling Procedure for Non-conformance Materials.
67 xi LIST OF FIGURES Figure 3.1: Adhesive product supplied.2: The strategy of research company in 2020+ .3: The overall procedure of material flow .4: SIPOC diagram for materials flow of process .5: Project Team Structure and Functions .6: I-MR Chart for scrapped quantity .7: Process mapping of monitoring materials .8: Pareto chart of scrapped quantity divided by material categories .9: Pareto charts of scrapped material divided by defect types .10: Pareto charts of scrapped material divided by Storage Location .11 5-WHY Brainstorming root cause of expired materials .12 The 5WHY Brainstorming root cause of scrapped materials in Internal Warehouse .13 The 5WHY Brainstorming root cause of scrapped materials in Cool Warehouse .14 Damaged trading goods when imported in Vietnam .15 Fish bond Diagram for analyzing cause of high viscosity issue .16 New procedure to control quantity of sale sample .17 I-MR chart of Scrapped Quantity of Sale Sample Before and After Improvement .18 New procedure to control quantity of Non-conformance Trading Goods .19 Imported goods before improvement (left) and after improvement (right) .20 Imported goods with torn bags before (left) and after (right) repacking .21 I-MR chart of Scrapped Quantity of Sale Sample Before and After Improvement .22 Guideline description of phase 0055 on MES in production process of product 2241544.23 Guideline description of phase 0050 on MES in production process of product 2374526.24 I-MR chart of trend of viscosity after 3 month for product 2241544 .25 Result of Taguchi Design calculated via MiniTab .26 I-MR chart of Increase in viscosity Before and After Improvement.27 Template of Non-conformance Traded Good Handling Process .28 Disposal report in Arp 2023 .29 8D report template for problem solving .30 Process parameters (temperature and speed) for batch produced in Aug 2023 .