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QC 7 TOOLSQC 7 TOOLSQC 7 TOOLSQC 7 TOOLSQC 7 TOOLSQC 7 TOOLSQC 7 TOOLSQC 7 TOOLS
2
������������� 7 ���� ( QC 7 Tools)
1. ���������� (Check Sheet)
2. ����������� � (Pareto Chart)
5. �������ก��ก�'�(ก)*+� (Scatter Diagram)
3. 1� ��ก�� (Histogram)
4. �������ก5��6)� (Cause 8 Effect : Diagram)
6. �������=��=*� (Control Chart)
7. ก����+�ABC�D5���) (Stratification)
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�!�"#�$���%&��ก����ก( )��%�*�ก���ก+ &,��-. • ��EJ�=��=*��)'��O��� (Monitoring) �)ก��OQ�����ก���)��• ��EJ�ก�������• ��EJ����=��'RGR���R�*D��=���L�+�O=)5��
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• กQ�R�O�B�P*6�'�=G�)'�BC�AEJ�����������• กQ�R�O6XB( (4M)• HO)����ก��� กQ�R�OBY)BกWZG• HO)���Q�L6MA5�กU�D5���)• 6�B�6�*��ก5LD HO)���กU�• กQ�R�Oก��MA5���������� (5W 1H)• �Q�D5���)�����=��'RG�)'�*6• ���F��G�D5���)O�� �)'���F��G��*6
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• �5���I�B�P*6�'�=GM�ก��MA5����������• ก��กD5���)'O�ก �+�(�+�ก���B�HNก• (�J��Iก���DI(�R�E�=BO)�ก��ก�H+�MO �ก���O(+����ก�H+��BC�• 'O�ก�+�ก���+��=+�R�E�MA5M�ก�����=��'RG• �5�����*6�)LO5HB�HIHIJก��กD5���)��U• ก+��MA5��+��������� ��5��ก=��HO)���กU�D5���)ก+��MA5���• �Iก��6�B�6�*��ก5LD��EJ�MR5�I6�'�H[������กDNC�
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(4��-�� ���6� ( ( ( (Pareto Chart)Pareto Chart)Pareto Chart)Pareto Chart)
�6S��������HIJMA5�O�MR5�RU�PN�=���B��B�[G�'R�+����R�*D��=����ก��+��กB�6����Z=����Y�I(HIJ�ก�ODNC�
(4��-�� ���6� ( ( ( (Pareto Chart)Pareto Chart)Pareto Chart)Pareto Chart)
FingerHand
Arm LegHead
Others
56 37 12 10 8 344.4 29.4 9.5 7.9 6.3 2.4
44.4 73.8 83.3 91.3 97.6 100.0
0
50
100
0
20
40
60
80
100
Defect
CountPercentCum %
Per
cent
Cou
nt
Pareto Chart for Accident
Accident Case
Head 8
Body 3
Arm 12
Hand 37
Leg 10
Finger 56
9
• 6�'ก��O5�(ก��F�H+��)'ก��F�5�• ��ก�ก�ก�M�����BC� ( �ก� Y) �)'�ก������� ( �ก� X) ก��F���� �'�I�ก��O��5�()'R�E��6��G�\U��G (%) D��D5���)'��(�+H��O5��D���E�D������B�O5�(• =�����D���H+�ก��F'��I(�)Q�OB��ก��กL6R��5�( �ก\5�(�E�L6D���E� (ก��5�M�ก)*+� D5���)HIJ�6S� “ D5���)�EJ�K ” '�Q�L6L�5HIJ�Q��R�+�*OH5�(D���ก�M����������
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• กQ�R�O��[Iก���กU�D5���)�)'A+����)�HIJ'HQ�ก���กU�• ��ก��������ก���B�HNก• �Q�L6�กU�D5���)• �Q�D5���)���*6BO��I(�)Q�OB�• �DI(�����B����� �
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ก��) (Graph)(Graph)(Graph)(Graph)
=E� ������HIJ�O�PN��B��)DR�E�D5���)H��P���HIJMA5 ��EJ��5��ก���Q����D5���)�)'���=��'RG�)D��D5���)OB�ก)+�� ��EJ�HQ�MR5�+�(�)'��O��U��+�ก��HQ�=����D5�M
ก��) (Graph)(Graph)(Graph)(Graph)
13
ก��)(<0� (Bar Chart)(Bar Chart)(Bar Chart)(Bar Chart)_ MA5��EJ��ID5���)��กก�+�R�E��H+�กB� 2 D5���) O(MA5ก���6�I(��HI(�HIJ�EC�HIJD��ก��F _ L�+�R��'�HIJ'MA5O���� �5�M��'('(�� ��+�R��'Q�R�B�D5���)M���+)'A+����)�
1,560
385
3,456
1,2001,456
354
4,512
1,3501,403
298
4,211
1,5251,305
275
4,652
3,512
1,298
265
3,877
523
1,148
222
4,026
1,4821,362
300
4,122
1,599
0
500
1,000
1,500
2,000
2,500
3,000
3,500
4,000
4,500
5,000
Baht
Apr May Jun Jul Aug Sep Average
Electricity Water Food Drink
Wife’s birth day
14
ก��)��,� ( ( ( (Line Chart)Line Chart)Line Chart)Line Chart)
_ MA5Q�R�B�O���� �5� ก���(�ก�ZGM����=� R�E�HQ���(�)�กD5���)M��OI�LO5
_ MA5M�ก��=��=*�������MR5LO5����6a�R��(HIJ�BC�L�5
1403
3512
523
1,599
1,3621148
1298130514561560
300222265
275298354385
3456
4,12240263877
4652
4211
4512
12001350
1525 1482
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
Apr May Jun Jul Aug Sep Average
Electricity Water Food Drink
15
Electricity18%
Water4%
Food56%
Drink22%
Electricity Water Food Drink
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=+�B�6�'�H[�oRB��B�[G (=+� r) =E� =+�HIJMA5�+���กOBA�ID��=���B��B�[GD���B��6� X �)' Y �+��I=���B��B�[GกB�M�H�^H��MO_ =+� r �I=+��'R�+�� -1 กB� 1 P5�=+� r �D5�Mก)5 0 �O��+�=+�RB��B�[G�'R�+���B��6��I�5�(_ =+� r = 1 =+�RB��B�[G�6S� +_ =+� r = -1 =+�RB��B�[G�6S� -(L�+�ID5�กQ�R�OD��=+� r �6S�����q����+��� DNC��(�+กB�=���Q�=BY�)'O*)(����D����5HIJกQ�)B� N̂กW�)กQ�R�OMR5 r = B�6�'�H[�oRB��B�[GD���J��B��(+��
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�����กABO�� �����กL�+ABO��
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28
• �������ก��ก�'�(ก)*+�HIJ�IRB��B�[G���)�
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29
• �������ก��ก�'�(ก)*+�HIJL�+�IRB��B�[G
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30
12.8 13.8 14.8 15.8 16.8
95% Confidence Interval for Mu
14.7 14.8 14.9 15.0 15.1 15.2 15.3 15.4 15.5
95% Confidence Interval for Median
Variable: Length (mm)
A-Squared:P-Value:
MeanStDevVarianceSkewnessKurtosisN
Minimum1st QuartileMedian3rd QuartileMaximum
14.7536
0.7001
14.8073
0.4460.264
15.0818 0.8791
0.772799-7.6E-011.13542
30
12.746414.552315.146415.681616.6746
15.4101
1.1818
15.4818
Anderson-Darling Normality Test
95% Confidence Interval for Mu
95% Confidence Interval for Sigma
95% Confidence Interval for Median
Descriptive Statistics
=E� ก��F�H+�����T��' O(�ก��BC�'�6S��B��)D�O� c =���PIJ d �)'�I�ก�����6S�D5���)D��=*Z��B��D���J�HIJ����M O(��I(�)Q�OB��ก�5�( HIJMA5O�=����6�6���D��ก�'���ก�� O(ก��B��ก���6�+��D��1� ��ก��HIJ�5��DNC��กD5���)HIJLO5�� O(ก��*+��B��(+��
U��6�(ก�� ( ( ( (Histogram)Histogram)Histogram)Histogram)
Length (mm)15.7308 15.0756 14.5324
15.0556 16.6746 14.7458
15.6857 14.3452 15.162
14.6842 14.4707 12.7464
14.5589 15.1495 15.4389
13.0559 16.0744 16.4569
15.2522 14.2411 15.6802
15.1254 15.0145 13.912
15.6353 15.7838 16.1992
15.1433 15.3298 15.4945
31
U��6�(ก�� ( ( ( (Histogram)Histogram)Histogram)Histogram)
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