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Seven Quality Control Techniques

Seven Quality Control Techniques

Check collection data

The checklist is a tool for data sorting and preliminary analysis using statistical tables. Its format can be varied. Although this method is relatively simple, it is practical and effective. It is mainly used for records or spot checks.

Layered analysis

The data stratification method, also known as the stratification method, is to summarize the data collected under the same conditions of the same nature for comparison and analysis.

Arrange the focus

Pareto chart is a tool to analyze and find the main factors affecting quality. Through the observation and analysis of the Pareto chart, the main factors affecting quality can be grasped.

Histogram significant distribution

The histogram is also called the mass distribution chart, the histogram, it is a main tool to show the data changes. The regularity of the data can be analyzed with the histogram, and the distribution status of product quality characteristics can be seen more intuitively.

Cause and effect

The so-called causal analysis diagram is to illustrate the many causes of a certain result in a systematic way, that is, to express the relationship between the result (characteristic) and the cause (factor) with a diagram. Its shape is like fish bone, also known as fish bone diagram.

See related

The scatter diagram is also called the correlation diagram. It draws two potentially related variable data on a coordinate diagram with points to indicate whether there is a correlation between a pair of data. This paired data may be a relationship of characteristic-cause, characteristic-characteristic, and cause-cause.

Control to find anomalies

Control charts are also called control charts. It is a diagram with control limits, used to distinguish whether the cause of quality fluctuations is accidental or systematic, and can provide information about the existence of system causes, thereby judging whether the production process is in a controlled state.

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publish time: 2021-03-09
Fiona_

This template mainly introduces the seven methods of quality control, namely, checking and collecting data, layering for analysis, ranking and focusing on key points, histogram first distribution, causal tracing, spreading to see correlation, and control to find anomalies. The checklist is a tool for data sorting and preliminary analysis using statistical tables. Its format can be varied. Although this method is relatively simple, it is practical and effective. It is mainly used for records or spot checks. You can learn about Q7 with this template and share it with everyone, I hope it will help you!

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