Is a commonly used statistical management method, also known as the primary statistical management method.
Second, the seven tools of QC (new)
Related chart
Correlation diagram, also known as relationship diagram, was put forward by Professor Akio Kikuchi of Yingqing University in Japan in 1960s. It is a chart used to analyze the complex relationship between things, such as "cause and effect" and "purpose and means". It can help people find solutions to problems from the logical relationship between things.
Affinity graph
Affinity diagram method, also known as KJ method, was initiated by Kawakita Jiro. It is a method to sort out a large number of collected language materials such as opinions or ideas about unknown things or unclear facts according to their correlation (similarity), so as to make the problem clear, obtain unified understanding and coordinate work, and facilitate the solution of the problem.
System diagram
System diagram is a method to systematically develop the purpose to be achieved and the measures or methods to be taken, and draw a chart to clarify the focus of the problem and find the best means or methods.
Process decision program diagram
Process decision program chart, also called PDPC (process decision program chart) method, is a method to analyze the factors that can lead to various results with the progress of the situation and determine an optimal process to achieve the ideal results.
Matrix diagram
Matrix diagram method is a method to find out the paired factors from the events of multidimensional problems, arrange them into a matrix diagram, and then analyze the problems according to the matrix diagram to determine the key points. It is a good method to explore the problem through comprehensive thinking of various factors.
Matrix data analysis chart
Matrix data analysis is to analyze multivariable and complex causality. If the relationship between elements on the matrix diagram can be expressed quantitatively by data, the results can be sorted and analyzed more accurately. This matrix diagram method which can be represented by data is called matrix data analysis. Among the seven new QC tools, data matrix analysis is the only method to use data to analyze problems, but the results still need to be graphically represented.
Arrow bar graph
The arrow bar diagram method is a method to represent the steps and operations needed in project implementation with network diagram according to the affiliation.
The seven methods of quality control, also known as the seven methods of QC or the primary statistical management method or Q7, are the seven tools often used in quality control [1][2]. Refers to a set of fixed graphics technology, which can be used to confirm the problems related to output and quality in the manufacturing process;
They are called foundations because they are suitable for people who have not received formal statistical training. The name originated in Japan after World War II, and may have been introduced by kaoru ishikawa at the national defense chemistry celebration in Wu with the metaphor of seven weapons.
The latter was influenced by edwards Deming's series of speeches to Japanese engineers and scientists in 1950.
At that time, those companies that controlled the quality of their labor training found that the complexity of statistical problems in quality control made most workers feel difficult. In order to reduce the difficulty, the training course mainly focuses on simpler and more convenient quality control methods, which are enough to solve most problems related to quality control.
These seven basic tools are in contrast with more advanced statistical techniques, such as survey sampling, acceptance sampling, statistical hypothesis testing, experimental design, multivariate analysis and various methods developed in the field of operational research. Project management institute mentioned these seven basic technologies in the Reference Guide of Project Management Knowledge System, which can be used as a set of conventional tools for planning or controlling project quality.
Of course, there are more than seven useful quality statistics management tools. In addition to the old and new seven tools, the commonly used tools include experimental design, distribution diagram, transition diagram, trend diagram and so on.
In fact, the methods of quality management can be divided into two categories: one is organizational quality management based on the idea of total quality management; The second is quality control based on mathematical statistics.
Organizational quality management method refers to the method of quality management from the perspective of organizational structure, business process and personnel working methods. It is based on the idea of total quality management, and its main contents include formulating quality policy, establishing quality assurance system, carrying out QC group activities, sharing quality responsibilities of various departments, and making quality diagnosis.