7 QC Tools With Examples


Have you wondered what tools you can use to help you in your quest to learn the basics of Quality Control? Luckily, seven QC tools are pretty helpful. In this article, I will cover several of these tools, including fishbone diagrams, histograms, scatter diagrams, control charts, and graphs and diagrams. These tools are great for helping you learn what you should do in your business and how you should go about it.

Fishbone diagram

A Fishbone Diagram is one of the seven essential QC tools. It is a quality control tool that identifies the major causes and helps improve process performance.

The Fishbone Diagram, also called the Ishikawa Diagram, was invented by Japanese professor Kaoru Ishikawa. It is a great way to brainstorm and prioritize relevant causes.

Getting the right people in the room for a successful fishbone diagram is essential. The team should include members with experience and expertise. In addition, they should have a clear understanding of the problem.

Before you start the fishbone diagram process, you should decide on a topic to analyze. This can be a problem, a symptom, or a directional indicator.

Once you have a problem or symptom, it is time to identify the leading causes of it. The five whys are a popular method for doing this.

Control chart

A control chart is one of the most popular and powerful tools in quality control. It analyzes a process, finds its stability, and predicts its performance. It is also an effective tool for process optimization.

The control chart uses an average line and lower and upper control limits to define the boundaries of a process. It is based on historical data. It determines if a process is out of control and whether a particular action is necessary.

Several conditions signal a process to be out of control. The chart can identify these, and a plan can be developed to bring the process back into power.

Scatter diagram

A Scatter diagram, a scattergram, or a correlation graph is a helpful visualization tool. It is commonly used in the Six Sigma methodology. The chart allows you to determine the relationship between two quality defects and possible causes.

It helps you to identify the problem’s causes and pinpoint the activities that lead to the issue. It is also a good communication tool. It can help you understand the flow of your process and its bottlenecks.

A Scatter diagram is one of the Seven Basic Tools of Quality, also known as 7 QC tools. These seven tools combine simple statistical methods and graphics that can be applied to a wide range of questions. They are easy to use and powerful.

Graph and Diagram

Graphs and diagrams are QC tools used to analyze and interpret data. These tools are effective in discriminating between types of variation. They are also helpful in determining the causes of quality issues. However, it is essential to note that the above two tools are not the only ones available. Instead, these tools are just a handful of the most popular.

A Pareto chart is an excellent tool for analyzing data. It shows the distribution of the number of events in a process in a simple bar graph. It helps you focus your attention on the top contributors to the problem. It is a valuable communication tool as well.

A Scatter diagram is another useful QC tool. It can help you define relationships between variables and defects. It can also help you find outliers. This tool is also viral in Six Sigma methodology.


If you are a quality manager, you may be familiar with “7 QC tools.” These basic graphical techniques help you represent data distribution in your production process. In addition, you can use these tools to identify problems and find solutions for them.

One of the 7 QC tools with examples is a histogram. This type of bar graph represents the frequency of data in a distribution. It’s also used to measure the normality of data. It can also be used to check the number of outliers in a distribution.

Another tool is a scatter diagram or correlation graph. This is a chart that demonstrates how variables in a process are related. This can help you determine which factors are most important. It can also identify the causes of a problem.