臺灣博碩士論文加值系統

ABSTRACT

Some companies recently became top enterprises by implementing Six-Sigma. Six-Sigma emphasizes teamwork and benchmarking, and combines most quality control and advance research results, enabling it to achieve a zero-defect level in business targets. This study primarily focuses on an application of six-sigma methodology to quality system, combined with an application to quality control, particularly using a control chart to implement quality items. This study using the GWMA control chart to detect small shifts in the process mean, while using a larger sample size to achieve more sensitive shift detection. Generally, the GWMA control chart can apply to beyond three sigma of the process quality level, and performs better in detecting small shifts in the process mean. The GWMA control chart is a good tool for analysis, improvement and control for businesses implementing six-sigma projects.

This study mainly focuses on an application by six-sigma methodology of supply chain system, including introduces strategies, operation process improvement and control. We combined with the application on quality control, especially using control charts to improve logistics quality. The major contribution of this study is to establish process on quality system improvement program and propose the suggestions of key performance index by DMAIC (Define, Measure, Analyze, Improve, and Control) steps. We use VBA (Visual Basic for Application) program to design the software of the related control skills to provide logistics quality control tools for the enterprises.

TABLE OF CONTENTS

ABSTRACT…I
TABLE OF CONTENTS…II
LIST OF FIGURE…IV
LIST OF TABLE…VII

CHAPTER 1 INTRODUCTION…1

1.1 Research Background and otivations…1
1.2 Research Objectives…2
1.3 Research scope…3
1.4 Research Process…4

CHAPTER 2 LITERATURE REVIEW…5
2.1 Quality and Quality Management…5
2.2 Sigma…9
2.3 DMAIC…11
2.4 Supply Chain Management…12
2.5 Control Chart…16
2.6 Visual Basic for Applications…19

CHAPTER 3 SIX-SIGMA ACTIVITIES OF SUPPLY CHAIN AND GWMA CONTROL CHART…20
3.1 Six-sigma Activities of SupplyChain…20
3.2 GWMA Control Chart for Monitoring Process Mean…28
3.3 ARL Performance…32
3.4 Example…48

CHAPTER 4 APPLICATION OF VBA TO GWMA CONTROL CHART…50
4.1 Important Features of the VBA…50
4.2 Design of GWMA Control Chart…55
4.3 GWMA Control Chart Software…56
4.4 User Guideline for the GWMA Control Chart…57
4.5 Example…59
4.5.1 GWMA Control Chart When n=1…59
4.5.2 GWMA Control Chart When n=2…61
4.5.3 GWMA Control Chart When n=3…63
4.5.4 GWMA Control Chart When n=4…65

CHAPTER 5 CONCLUSIONS…67
5.1 Conclusion…67

REFERENCES…69

LIST OF FIGURE
Fig. 1-1 Research Process…4
Fig. 2-1 The Four Levels in the Evolution of Quality Management…7
Fig. 2-2 DMAIC…11
Fig. 2-3 Quality Management Influence and Materials Flow Across Supply Chain…13
Fig.3-1 Balanced Scorecard Addresses Four Key Performance Aspects…23
Fig. 3-2 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.50…42
Fig. 3-3 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.75…43
Fig. 3-4 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.80…43
Fig. 3-5 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.90…43
Fig. 3-6 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.50…44
Fig. 3-7 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.75…44
Fig. 3-8 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.80…44
Fig. 3-9 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.90…45
Fig. 3-10 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.50…45
Fig. 3-11 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.75…45
Fig. 3-12 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.80…46
Fig. 3-13 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.90…46
Fig. 3-14 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.50…46
Fig. 3-15 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.75…47
Fig. 3-16 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.80…47
Fig. 3-17 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.90…47
Fig. 3-18 GWMA control scheme…49
Fig. 4-1 Visual Basic Editor…51
Fig. 4-2 Project Explorer Windows…51
Fig. 4-3 Properties Window…52
Fig. 4-4 Standard Toolbar…52
Fig. 4-5 Edit Toolbar…53
Fig. 4-6 Debug Toolbar…53
Fig. 4-7 Object Browsers…54
Fig. 4-8 GWMA Control Chart Buttons…56
Fig. 4-9 GWMA Control Chart Main Screen…57
Fig. 4-10 GWMA Control Button Function…58
Fig. 4-11 Data When n=1…59
Fig. 4-12 GWMA Control Chart When n=1…60
Fig. 4-13 Data When n=2…61
Fig. 4-14 GWMA Control Chart When n=2…62
Fig. 4-15 Data When n=3…63
Fig. 4-16 GWMA Control Chart When n=3…64
Fig. 4-17 Data When n=4…65
Fig. 4-18 GWMA Control Chart When n=4…66

LIST OF TABLE

Table 2-1 Summary of Quality Definition…5
Table 2-2 Definitions of TQM…6
Table 2-3 Contrasting Six-sigma and TQM…10
Table 2-4 Definition of SCM…14
Table 2-5 Advantages of VBA…19
Table 3-1 Supply Chain Management Stage…21
Table 3-2 Quality Indicators of Supply Chain…24
Table 3-3 DMAIC Steps on Supply Chain Management…25
Table 3-4 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.50…34
Table 3-5 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.75…34
Table 3-6 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.80…35
Table 3-7 ARLs of the GWMA Control Chart with Control Limits Width L=2.50, q=0.90…35
Table 3-8 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.50…36
Table 3-9 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.75…36
Table 3-10 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.80…37
Table 3-11 ARLs of the GWMA Control Chart with Control Limits Width L=2.75, q=0.90…37
Table 3-12 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.50…38
Table 3-13 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.75…38
Table 3-14 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.80…39
Table 3-15 ARLs of the GWMA Control Chart with Control Limits Width L=3.00, q=0.90…39
Table 3-16 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.50…40
Table 3-17 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.75…40
Table 3-18 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.80…41
Table 3-19 ARLs of the GWMA Control Chart with Control Limits Width L=3.25, q=0.90…41
Table 3-20 Transfer Time Measurements for Distribution Center…48

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