The document introduces the seven quality control tools: cause and effect diagram, Pareto analysis, flow chart, scatter diagram, check sheet, histogram, and control chart. These tools are used to collect and analyze data, identify root causes of problems, and measure results with the goals of process improvement and statistical process control. Each tool is defined along with its purpose and benefits. Examples are also provided for some of the tools.

1. Seven Quality
Control Tools
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2. Introduction
QC tools are the means for Colleting data ,analyzing data ,
identifying root causes and measuring the results. These tools are
related to numerical data processing. User has to develop the
solution & implement 7 QC tools
7 QC tools are means for:
• Collecting data
• Analyzing data
• Identifying root cause
• Measure the results
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3. 7 QC Tools
• Cause and effect diagram
• Pareto Analysis
• Flow chart
• Scatter diagram
• Check sheet
• Histogram
• Control chart
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4. Cause and effect diagram
• It is also known as ishikawa and fish bone diagram.
Purpose: Graphical representation of potential causes of a
problem
Brainstorming fishbone diagram
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5. Benefits
•Breaks problems down into bite size
pieces to find out cause
•Foster team work
•Common understanding of factors
causing problem
•Follows brainstorming relationship
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6. Example
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7. Flow chart
Purpose: visual illustration of the sequence of operation
required to complete a task
• schematic drawing of the process to measure or improve
• Potential weakness in the process are made visual
• Picture of process as it should be
Benefits:
Identify process improvements
Understand the process
Shows duplicated effort and other non-valued added steps
Clarify working relationships between people and
organization
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9. Example
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10. Check sheet
Purpose: tool for collecting and organizing
measured or counted data
• Data collected can be used as input data for
other tools
Benefits: collect data in a systematic and
organized manner
• To determine source of problem
• To facilitate classification of data (stratification)
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11. Cont.
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12. Histogram
• Plotting the shapes of a distribution and comparing it with
specification
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13. Cont.
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14. ParetoAnalysis
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Pareto analysis is a ranked comparison of factor related to a
quality problem. It helps a quality improvement project
teams to identify and focus on the VITAL few factors.
Benefits
• Prioritizing problems
• Analyzing symptoms
• Proving effectiveness of remedy

15. Cont.
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16. Control chart
Purpose: The primary purpose of a control chart
is to predict expected product outcome.
Benefits:
• Predict process out of control and out of
specification limits
• Distinguish between specific, identifiable causes
of variation
• Can be used for Statistical Process Control
(SPC)
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18. What does it look like
• Adding the element of the will help clarify your
understanding of the causes of variation in the processes
• A run chart is a line graph of data points organized in
time sequence and centered on the median data value.
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19. Scatter diagram
• Purpose: To identify the correlation between two variables
• Benefits: helps identify and test probable causes
• By knowing which elements of your process are related and how they
are related
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