7QC Tools
7QC Tools
7QC Tools
QToolsTM Bundle
Plan-Do-Study-Act plus QToolsTM
Fishbone Diagram
Run Chart
Pareto Chart
Flowchart
Scatter Diagram
Check Sheet
5 Whys
“The Old Seven.”
Quality pros have many names for these seven basic tools of quality, first emphasized by Kaoru Ishikawa, a prof
essor of engineering at Tokyo University and the father of “quality circles.”
Start your quality journey by mastering these tools, and you'll have a name for them too: "indispensable."
Start your quality journey by mastering these tools, and you'll have a name for them too: "indispensable."
Cause-and-effect diagram (also called Ishikawa or fishbone chart): Identifies many possible causes for an effect
or problem and sorts ideas into useful categories.
Check sheet: A structured, prepared form for collecting and analyzing data; a generic tool that can be adapted fo
r a wide variety of purposes.
Control charts: Graphs used to study how a process changes over time.
Histogram: The most commonly used graph for showing frequency distributions, or how often each different val
ue in a set of data occurs.
Pareto chart: Shows on a bar graph which factors are more significant.
Scatter diagram: Graphs pairs of numerical data, one variable on each axis, to look for a relationship.
Stratification: A technique that separates data gathered from a variety of sources so that patterns can be seen (so
me lists replace “stratification” with “flowchart” or “run chart”).
Excerpted from Nancy R. Tague’s The Quality Toolbox, Second Edition, ASQ Quality Press, 2005, page 15.
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