17-08-2017, 10:35 AM
The Seven Basic Quality Tools (also known as 7 QC Tools) originated in Japan when the country was experiencing a great quality revolution and had become a mandatory subject as part of Japan's industrial training program. These tools, which comprised simple graphical and statistical techniques, were useful for solving problems related to critical quality. These tools were often referred to as Seven Basic Quality Tools, as these tools could be implemented by anyone with very basic training in statistics and were easy to apply to solve quality problems.
1. Cause and effect diagram (also called Ishikawa or fishbone chart): Identifies many possible causes of an effect or problem and classifies ideas into useful categories.
2. Check sheet: A structured and prepared way to collect and analyze data; A generic tool that can be adapted for a wide variety of purposes.
3. Control Charts: Charts used to study how a process changes over time.
4. Histogram: The most commonly used graph to show frequency distributions, or the frequency with which each different value occurs in a data set.
5. Pareto diagram: Shows in a bar graph what are the most significant factors.
6. Scatter diagram: Graphs pairs of numerical data, a variable on each axis, to search for a relation.
7. Stratification: A technique that separates data collected from a variety of sources so that patterns can be viewed (some lists replace "stratification" by "flow chart" or "performance chart").