What are the 7 basic tools of quality control?

* 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 for 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 value 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 (some lists replace “stratification” with “flowchart” or “run chart”).

cause & effect diagram, check sheets,control chart, histogram,pareto chart, scatter diagram,flow chart

*The Seven Basic Tools of Quality include: 1.Checklist - A simple data-recording device. Check sheets and simple surveys are effective methods, easy to design, and fun to implement either as an individual or a team. They are provide a snapshot of the process being studied and reveal underlying patterns including the frequency of an event or activity. Frequently, check sheet results are turned into Pareto charts [next]. 2. Pareto chart - A graphical tool for ranking causes from most significant to least significant. A Pareto chart is a series of vertical bars lined up in a descending order - from high to low - to reflect frequency, importance, or impact. Pareto charts quickly draw everyone's attention to the most important factor - providing an at-a-glance snapshot of priorities. 3. Flowchart/process map - Graphical tools that shows the major steps in a process. Flowcharts are a useful tool for for examining how various steps are related to each other. By studying these charts individuals and teams can often uncover potential sources of trouble and/or identify steps to be taken to improve or error-proof a process. 4. Cause-effect diagram - A tool for analyzing and illustrating a process by showing the main causes and subcauses leading to an effect (symptom). It is sometimes referred to as the "Ishikawa diagram," because Kaoru Ishikawa developed it, and the "fishbone diagram," because the complete diagram resembles a fish skeleton. The fishbone is easy to construct and invites interactive participation. 5. Histogram - A graphic summary of a set of data that reveals the amount of variation that a process has within it. The pictorial nature of the histogram lets people see patterns that are difficult to detect in a simple table of numbers. Control charts [below] are actually a series of histograms laid on their side with acceptable variation levels indicated in the form of upper and lower statistical control limits [+/- three standard deviations]. 6. Scatter diagrams - A graphical technique to analyze the relationship between two variables. Two sets of data are plotted on a graph, with the y-axis being used for the variable to be predicted and the x-axis being used for the variable to make the prediction. The graph will show possible relationships among variables: those who know most about the variables must evaluate whether they are actually related or only appear to be related. 7. Control chart - A run chart with upper and lower control limits on which values of some statistical measure for a series of samples or subgroups are plotted. The chart frequently shows a central line to help detect a trend of plotted values. It helps determine whether or not a process is operating consistently or if a special cause has occurred to change the process mean or variance. Improvements in common cause variation require fundamental changes in the process.

Check, Cause, Control,

Histo, Pareto, Flow

and Scatter.

(if you wanna memorize them smooooothly ;)

Back in the early21st century, General Motors provided an answer to this as a support piece for TS16949. They were the8 basci elements of quality called "QSB" or Quality Systems Basics. I will leave it to you to google this and get their take on the basic tools of quality.