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Quality
According to Quality Guru Juran, Quality is
fitness for use.
Quality is a perceptual, conditional, and
somewhat subjective attribute and may be
understood differently by different people.
Jim Relay defines Quality in his book
‘Production & Operation’ that Quality is
about meeting the needs and expectations
of customers.
7 Tools of Quality
⚫Check Sheet
⚫Histogram
⚫Pareto Chart
⚫Cause & Effect diagram
⚫Control Chart
⚫Scatter Diagram
⚫Flow Chart
Check Sheet
The check sheet is a form (document)
used to collect data in real time at the
location where the data is generated. The
data it captures can be quantitative or
qualitative. When the information is
quantitative, the check sheet is sometimes
called a tally sheet.
⚫simple data recording device.
⚫systematically record and compile data
from sources.
Check Sheet
Defect 1st hour 2nd hour 3rd hour 4th hour 5th hour Total
Skip Stitch
28
Open
Seam 24
Point
Up-down 17
Dirty Spot 14
Pleat
7
GARMENT (T-SHIRT) MANUFACTURING
Histograms
A histogram is a bar graph that shows
frequency data. It is used to
graphically summarize and display the
distribution and variation of a process
data set. It provides the easiest way to
evaluate the distribution of data.
Histograms
30
25
20
15
10
5
0
Open
Seam
Skip Dirty Pleat Point up-
Stitchindiv
Si
p
d
ou
t al defects down
Pareto Charts
The Pareto chart can be used to display
categories of problems graphically so
they can be properly prioritized.
A Pareto chart or diagram indicates which
problem to tackle first by showing the
proportion of the total problem that each
of the smaller problems comprise.
This is based on the Pareto Principle: 20%
of the sources cause 80% of the
problem.
Pareto Charts
28
24
17
14
7
100
90
80
70
60
50
40
30
20
10
0
45
40
35
30
25
20
15
10
5
0
Skip StitchOpen Sea
P
m
oint Up-dowD
nirty Spot Pleat
Individual
Defects
Count
Cumulitive
Percent
Cause and Effect Diagrams
One analysis tool is the Cause and
Effect or Fishbone diagram. These are
also called Ishikawa diagrams
because Kaoru Ishikawa developed
them in 1943. They are called
fishbone diagrams since they
resemble one with the long spine and
various connecting branches.
Benefits of constructing a Cause-and-Effect
Diagram are that it
⚫ Helps determine the root causes of a problem or
quality characteristic using a structured approach.
⚫ Encourages group participation and utilizes group
knowledge of the process.
⚫ Uses an orderly, easy-to-read format to diagram
cause and effect relationships
⚫ Indicates possible causes of variation in a process.
⚫ Increases knowledge of the process by helping
everyone to learn more about the factors at work
and how they relate.
Fishbone Diagram
Example:
Man Machin
e
Method Material
M/C
Timing
M/C Tension
Inefficienc
y
Skip
Stitch
Control Charts
Control charts, also known as process-behavior
charts, in statistical process control are tools used
to determine if a manufacturing or business
process is in a state of statistical control.
Scatter Diagrams
A scatter diagram shows the correlation
between two variables in a process.
⚫The scatter diagram graphs pairs of
numerical data, with one variable on
each axis, to look for a relationship
between them. If the variables are
correlated, the points will fall along a
line or curve. The better the
correlation, the tighter the points will
hug the line.
Scatter Diagrams
Flow Charts
A flowchart is a
formalized graphic
representation of a
logic sequence,
work or manufacturing
process, organization
chart, or similar formalized structure.
THANK YOU

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7toolsofquality-141213133057-conversion-gate02 (1).pptx

  • 1.
  • 2. Quality According to Quality Guru Juran, Quality is fitness for use. Quality is a perceptual, conditional, and somewhat subjective attribute and may be understood differently by different people. Jim Relay defines Quality in his book ‘Production & Operation’ that Quality is about meeting the needs and expectations of customers.
  • 3. 7 Tools of Quality ⚫Check Sheet ⚫Histogram ⚫Pareto Chart ⚫Cause & Effect diagram ⚫Control Chart ⚫Scatter Diagram ⚫Flow Chart
  • 4. Check Sheet The check sheet is a form (document) used to collect data in real time at the location where the data is generated. The data it captures can be quantitative or qualitative. When the information is quantitative, the check sheet is sometimes called a tally sheet. ⚫simple data recording device. ⚫systematically record and compile data from sources.
  • 5. Check Sheet Defect 1st hour 2nd hour 3rd hour 4th hour 5th hour Total Skip Stitch 28 Open Seam 24 Point Up-down 17 Dirty Spot 14 Pleat 7 GARMENT (T-SHIRT) MANUFACTURING
  • 6. Histograms A histogram is a bar graph that shows frequency data. It is used to graphically summarize and display the distribution and variation of a process data set. It provides the easiest way to evaluate the distribution of data.
  • 7. Histograms 30 25 20 15 10 5 0 Open Seam Skip Dirty Pleat Point up- Stitchindiv Si p d ou t al defects down
  • 8. Pareto Charts The Pareto chart can be used to display categories of problems graphically so they can be properly prioritized. A Pareto chart or diagram indicates which problem to tackle first by showing the proportion of the total problem that each of the smaller problems comprise. This is based on the Pareto Principle: 20% of the sources cause 80% of the problem.
  • 9. Pareto Charts 28 24 17 14 7 100 90 80 70 60 50 40 30 20 10 0 45 40 35 30 25 20 15 10 5 0 Skip StitchOpen Sea P m oint Up-dowD nirty Spot Pleat Individual Defects Count Cumulitive Percent
  • 10. Cause and Effect Diagrams One analysis tool is the Cause and Effect or Fishbone diagram. These are also called Ishikawa diagrams because Kaoru Ishikawa developed them in 1943. They are called fishbone diagrams since they resemble one with the long spine and various connecting branches.
  • 11. Benefits of constructing a Cause-and-Effect Diagram are that it ⚫ Helps determine the root causes of a problem or quality characteristic using a structured approach. ⚫ Encourages group participation and utilizes group knowledge of the process. ⚫ Uses an orderly, easy-to-read format to diagram cause and effect relationships ⚫ Indicates possible causes of variation in a process. ⚫ Increases knowledge of the process by helping everyone to learn more about the factors at work and how they relate.
  • 12. Fishbone Diagram Example: Man Machin e Method Material M/C Timing M/C Tension Inefficienc y Skip Stitch
  • 13. Control Charts Control charts, also known as process-behavior charts, in statistical process control are tools used to determine if a manufacturing or business process is in a state of statistical control.
  • 14. Scatter Diagrams A scatter diagram shows the correlation between two variables in a process. ⚫The scatter diagram graphs pairs of numerical data, with one variable on each axis, to look for a relationship between them. If the variables are correlated, the points will fall along a line or curve. The better the correlation, the tighter the points will hug the line.
  • 16. Flow Charts A flowchart is a formalized graphic representation of a logic sequence, work or manufacturing process, organization chart, or similar formalized structure.