The document outlines the 7 Quality Control (QC) tools, which are essential for solving quality problems and improving processes. These tools, as stated by Dr. Kaoru Ishikawa, can solve 95% of quality issues and include check sheets, histograms, pareto charts, cause and effect diagrams, scatter diagrams, flow charts, and control charts. Each tool serves a specific function in data collection and analysis to enhance quality management.

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-5S Balamurugan
QC Tools Basics
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2.  The 7 quality tools are simple graphical and statistical tools but very
powerful in solving quality problems and process improvement.
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Check Sheet Histogram Pareto Chart
Cause & Effect Diagram
Scatter Diagram
Flow Chart
Control Chart
7 QC Tools
Kaoru Ishikawa has stated that 95% of the quality problems can be solved by using “7 QC Tools”
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7 QC Tools
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4. 7 QC Tools
Checksheet - Ma;Tj;jhs;
 A check sheet is a structured, preparedform for collectingand analyzing data.
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5. 7 QC Tools
Histogram - gl;il tiuglk;
 Histogramis the graphical representationof data where data is grouped into
continuousnumber ranges and each range correspondsto a vertical bar.
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6. 7 QC Tools
Pareto Chart - gNul;Nlh tiuglk;
 The Pareto chart is a bar graph that helps in prioritizingthe efforts towards
improvement. The rule says, 80% of Problemsare due to 20% of Reasons.
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7. 7 QC Tools
Scatter Diagram – rpjwy; tiuglk;
 It shows the relationshipbetween two variables in the form of dots.
 Two variables are plottedon the X and Y axis, and the pattern of dots shows the
type of relationship.
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8. 7 QC Tools
 Cause & Effect Diagram is a brainstorming tool, that help to identify the probable causes
for an effect (or problem) and sorts them into categories.
 It is visualized in the shape skeleton of a Fish.
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9. 7 QC Tools
Control Chart – fl;Lg;ghl;L tiuglk;
 A simple Trend chart that contains the specification and control limits and the trend line
helps in understanding how controlled a particular process or product characteristic is
behaving over a period of time. The best part is, it can be used as a Proactive tool.
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10. 7 QC Tools
Flow Chart – Xl;l tpsf;fg;glk;
 Flow chart is a simple mapping tool that shows the sequence of actions within
a process, in a form that is easy to read and communicate.
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11. - 5S BALAMURUGAN
BSc(CS).,MBA.,MA(PM&IR).,MSc(Psy).,PHRM.,
Lean Management Professional
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