Refer to master index list for project management articles.
This is child article describing the tools of Quality Control. Refer to the parent article here
Note: The images in this post have been taken from the internet.
The seven basic tools of Quality are briefly described below:
Fishbone Diagram (or Cause–and–Effect Diagram or Ishikawa Diagram)
The fish bone diagram identifies many possible causes for an effect or problem
It illustrates how various factors may be linked to potential problems or effects.
It immediately sorts ideas into useful categories.
Control Charts
Its purpose is to determine whether a process is stable or has predictable performance.
These charts gather data to illustrate process behavior in a variation situation over a period of time.
Control charts can be used to assess whether the application of process changes resulted in the desired improvements or not.
They can be used for both project and product life cycle processes. Can be used to monitor any type of output variable.
Flow Chart
We may have used flowcharts at some point in time. Its helps to analyze how problems occur by graphically representing a process.
Histogram
A histogram is a bar chart showing distribution of variables. Each column represents a problem. Height represents the relative frequency of the characteristic.
Histograms helps to identify the cause of the problem in a process by the shape and width of the distribution.
Pareto Chart
Pareto chart is a histogram (bar chart) that shows number of defects against a type of cause. This technique is used to identify and evaluate non-comformities.
Pareto charts are conceptually related to Pareto's Law (commonly known as as the 80/20 principle which states that 80 percent of the problems are due to 20 percent of the causes)
Run chart
Line chart that shows history and pattern of variation. They show trends in a process over time, improvements/declines in a process over time.
Used to forecast future outcomes based on historical results.
Scatter diagram
Shows the pattern of relationships between two variables.
Dependent variables versus independent variables are plotted. The closer the points to the diagonal line, the more closely they are related.
Statistical Sampling
A small quantity of product is tested for quality. If the product passes the quality test, the lot is accepted.
Note: The images in this post have been taken from the internet.
This is child article describing the tools of Quality Control. Refer to the parent article here
Note: The images in this post have been taken from the internet.
The seven basic tools of Quality are briefly described below:
Fishbone Diagram (or Cause–and–Effect Diagram or Ishikawa Diagram)
The fish bone diagram identifies many possible causes for an effect or problem
It illustrates how various factors may be linked to potential problems or effects.
It immediately sorts ideas into useful categories.
Its purpose is to determine whether a process is stable or has predictable performance.
These charts gather data to illustrate process behavior in a variation situation over a period of time.
Control charts can be used to assess whether the application of process changes resulted in the desired improvements or not.
They can be used for both project and product life cycle processes. Can be used to monitor any type of output variable.
Flow Chart
We may have used flowcharts at some point in time. Its helps to analyze how problems occur by graphically representing a process.
Histogram
A histogram is a bar chart showing distribution of variables. Each column represents a problem. Height represents the relative frequency of the characteristic.
Histograms helps to identify the cause of the problem in a process by the shape and width of the distribution.
Pareto chart is a histogram (bar chart) that shows number of defects against a type of cause. This technique is used to identify and evaluate non-comformities.
Pareto charts are conceptually related to Pareto's Law (commonly known as as the 80/20 principle which states that 80 percent of the problems are due to 20 percent of the causes)
Run chart
Line chart that shows history and pattern of variation. They show trends in a process over time, improvements/declines in a process over time.
Used to forecast future outcomes based on historical results.
Scatter diagram
Shows the pattern of relationships between two variables.
Dependent variables versus independent variables are plotted. The closer the points to the diagonal line, the more closely they are related.
Statistical Sampling
A small quantity of product is tested for quality. If the product passes the quality test, the lot is accepted.
Note: The images in this post have been taken from the internet.
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