MINISTRY OF EDUCATION &amp TRAINING
HO CHI MINH CITY UNIVERSITY OF EDUCATION AND TECHNOLOGY
FACULTY OF ECONOMICS

GRADUATION THESIS
TOPIC:

APPLYING PROPLEM SOLVING SHEET TO
REDUCE SAWTOOTH DEFECT ON LOOP 062 IN
THE LOOP LINE 12 AT BOSCH VIETNAM CO., LTD

Student

: Dinh Huu Nhan

Student ID : 21124450
Course

: 2021

Major

: Industrial Management

Instructor

: Ph.D Nguyen Khac Hieu

Ho Chi Minh City, August 2024

MINISTRY OF EDUCATION &amp TRAINING
HO CHI MINH CITY UNIVERSITY OF EDUCATION AND TECHNOLOGY
FACULTY OF ECONOMICS

GRADUATION THESIS
TOPIC:

APPLYING PROPLEM SOLVING SHEET TO
REDUCE SAWTOOTH DEFECT ON LOOP 062 IN
THE LOOP LINE 12 AT BOSCH VIETNAM CO., LTD

Student

: Dinh Huu Nhan

Student ID : 21124450
Course

: 2021

Major

: Industrial Management

Instructor

: Ph.D Nguyen Khac Hieu

Ho Chi Minh City, August 2024
II

ACKNOWLEDGEMENTS
First and foremost, the author would like to express heartfelt gratitude to all of
the teachers in the Faculty of Economics at Ho Chi Minh City University of Education
and Technology. With deep gratitude for the dedicated guidance and valuable
knowledge shared by my esteemed professors, I have built a solid foundation in
specialized concepts and content, which has been instrumental in completing this
graduation thesis.
In particular, I would like to express my sincere thanks to my internship
supervisor, professor Nguyen Khac Hieu. His invaluable time, dedicated support,
guidance, and direction throughout the research and report preparation process have
been invaluable. I would also like to extend my heartfelt gratitude to the Board of
Directors of Bosch Vietnam Co., Ltd. for providing me with the opportunity to intern
at the company. This practical experience has significantly enhanced my knowledge
and professional skills. I am truly grateful for the generous support and guidance from
the MSE2 department, especially Mr. Vo Ngoc Nhut (HcP/MFE2.11) and Mr. Quang
Minh Trung (HcP/MFE2.11).
The internship period at Bosch Vietnam has been an excellent opportunity for
me to experience a professional, dynamic, and creative working environment. I have
learned a great deal from my colleagues, applied theoretical knowledge to practice
situations and broadened my understanding of the research field. I acknowledge that
this graduation thesis may have certain limitations due to gaps in my knowledge and
practical experience. I would greatly appreciate any feedback from my esteemed
professors to help me furth
...

...
maintenance

checking the balance

aren’t balanced when activities at machine between both of clamps
it’s operating

which

are

task (MRC 1.2)

(TRC 1.2)

related

to

Ring

clamping

jaw

without checking the
balance

between

both of clamps
(Source: MSE2.11 Department)

88

Appendix 3: 5 Why table of direct cause 1 for non-detection
Direct cause
Ring

is

Why 1

Why 2

Why 3

Why 4

Why 5

mis- Why is Ring mis- Why does no one check the

aligned in Ring aligned in the Ring Ring misaligned in the Ring
loader arm

loader arm?

loader arm ?

No one check the No standards define for
Ring mis-aligned in operators
the Ring loader arm

check

misalignment of Ring in
Ring loader arm
(MRC 1.3)
(Source: MSE2.11 Department)

Appendix 4: 5 Why table of direct cause 2 for occurrence
Direct cause

Why 1

Why 2

Why 3

Why 4

Why 5

The gap between Ring Why is the gap Why is Ring loader Why is Ring loader Why is the thread Why is the assembly of
and Ra roller and Pulling between Ring and arm angle changed? arm loosened?

screw of the Ring the thread screw of the

is NOK

loader

Ra

roller

Pulling

and
roller

loosened?

NOK?

89

arm Ring loader arm not
tightened?

The

Ring

arm

loader Ring loader arm is Thread screw of Assemble

angle

is loosened

Ring loader arm is thread

changed

Why is the gap Why

do

between Ring and maintenance
Ra

roller

Pulling

and activities
roller check

NOK?

not
the

regap

between Ring and
Rollers?

There

are No standard defined

maintenance
activities

to release machine
at after these activities

machine which are fixed

machine

tasks related to the which task related
position of Ring and to position of Ring
Rollers

no and Rollers

rechecking the gap (MRC 2.2)
between Ring and
Rollers

90

screw

the No

standard

for

of assembling this thread

loosened

Ring loader arm screw in Ring loader arm

(TRC 2.1)

isn’t tightened

(MRC 2.1)

(Source: : MSE2.11 Department)

Appendix 5: 5 Why table of direct cause 2 for non-detection
Direct cause

Why 1

Why 2

Why 3

Why 4

Why 5

The gap between Why is the gap between Why do operators only
Ring and Ra roller Ring and Ra roller and check this gap by nakedand Pulling roller is Pulling roller NOK?

eye?

NOK

Operators only check Current

standard

of

this gap by naked-eye checking this gap only
cause
correct

result

wasn’t request

operators

to

check by naked-eye (non
numerical measurement
so wasn’t correct)
(MRC 2.3)
(Source: : MSE2.11 Department)

91