Application of Data Processing in Quality Control

Chinese abstract:

Data processing is widely used in quality control, for example, in the product design stage, quality control has become the "bottleneck" of product quality control. On the basis of defining the concept of product design quality, a hierarchical model of product design quality control is established. Combined with this model, the research status of typical modern product design quality control technologies and methods such as design for six sigma, quality assurance design, product design fluctuation risk management, early determination of product attributes, and anti-fraud in design process are summarized. Finally, by collecting data. Handle. The shortcomings of product design quality control methods and technology research are analyzed and summarized, and the follow-up research is prospected. Gradually improve, so as to control product quality.

Keywords: product design quality, hierarchical model of quality control

Control technology and method: logarithmic processing is used to control product quality.

I. Text

With the deepening of product design and the research on the theory and method of total quality management and control, people gradually find that 70%-80% of product quality is decided in the design stage; The quality control in the product design stage is the "bottleneck" of the product, and the quality control efficiency in the product design stage is the highest. Therefore, people continue to study from improving the product design process itself and integrating quality control methods, and a large number of related quality control theories, technologies and methods have emerged in the product design stage. Nevertheless, the quality control situation in the product design stage is not optimistic: the explosion of the space shuttle Challenge and the disappearance of the spacecraft in the Martian climate orbit are endless. According to a survey, 70% of the quality loss of Japanese manufacturing industry is rooted in the high cost of product quality control in the design stage, and the composition is unreasonable. The proportion of quality control and prevention expenses in the design stage needs to be improved.

Therefore, strengthening the research and practice of quality control methods and techniques in product design stage is the best way to improve the overall quality level of products, optimize and reduce the overall quality cost. Starting from the concept of product quality, the concept of product design quality is expounded, the hierarchical model of product design quality control is put forward, and the research status of modern typical product design quality control technologies and methods is summarized. Finally, the shortcomings of the research are summarized and the future research is prospected. Gradually improve, so as to control product quality.

In order to control the quality of product design stage comprehensively and effectively, we must first make clear the control object, that is, clearly describe the quality content and expression form of product design stage. Although there are many research documents about quality control, the concept of quality has not been effectively defined. Therefore, many research institutions and scholars have studied the definitions of product quality and design quality in an attempt to solve the above problems.

On the definition of product quality, the typical research is as follows: iso900 1:20xx: 20xx standard gives the definition that product quality is the degree to which a set of inherent characteristics meet the requirements; According to the definition given by the European quality standard din55350, product quality is the degree to which product attributes and characteristics meet the given requirements. In addition, Professor david a.garvin of Harvard Business School put forward the concept of eight-dimensional product quality framework, and Professor mikkel morup of Data Transmission Unit Engineering Design Institute put forward two quality theories, namely Q and Q.

Product design quality is the instantiation of product quality in the design stage. The typical research in this aspect includes: hubka.v, a famous European engineering design expert, put forward nine factors that affect product design quality, namely, customer demand, technical system, design process, designer, quality assurance tools, technical knowledge base, design process management, design environment and processes and methods used by designers; Academician Xie Youbai, a Chinese scholar, believes that product quality is subordinate to function and quality characteristics are dependent on product design characteristics. Without function, quality is out of the question, and quality is a measure of the degree and durability of realizing function. Dr gavin finn, a famous American quality management expert, pointed out that the quality of product design stage is reflected by the quality of product design drawings and technical documents, and the general criteria for measuring are: adequacy of functional requirements, accuracy of geometric data and adaptability of design data to downstream requirements; Professor einar j. aa of Norwegian University of Science and Technology proposed to define the design quality from the perspective of probability, that is, the probability that the design object meets the specification, and Q design =p the probability that the design object meets the specification. According to the system design method, axiomatic design method and function-behavior-structure evolutionary design method, the product design stage can be described as: under certain constraints, the requirements are mapped into functional models and structural models in stages, and finally engineering drawings and product specifications are generated, and the product parameter states are the demand parameters in turn. As can be seen from the above, the essence of product design is the change of the state and characteristic attributes of design parameters, and product design parameters are the main body of product design information. Therefore, on the basis of relevant research on product quality and product design quality, this paper gives the concept of design quality from the point of view of facilitating design quality control: namely, the degree to which product quality characteristics meet the requirements of product function and performance constraints in the design stage, and the standard to measure the degree is the input of design at all levels, and the form of measurement is design output/design input, in which quality characteristics are the mapping set from product design parameters at all levels to quality control view, and the set of all product quality characteristics constitutes the quality view of product data, which is the main operation object in the application field of quality control.

On the basis of defining the concept of product design quality, in order to effectively control it at different levels and facilitate the systematic analysis of its control strategies and methods, the following hierarchical model of product design quality control is proposed, as shown in figure 1. ... quality

Quantity presentation layer ... quality characteristic layer ... schematic diagram of design parameter layer 1 hierarchical model of product design quality control As can be seen from the figure, product design quality control can be controlled from different levels such as quality presentation layer, quality characteristic layer and design parameter layer. The quality performance layer is realized by controlling and eliminating the concrete manifestations of quality problems. Typical performance is function fluctuation, function failure and design error, which is the outermost layer of product design quality control to ensure product design quality. The quality characteristic layer controls and guarantees the product design quality by controlling the quality characteristics that determine and affect the product quality. Quality characteristics are inherent characteristics of products [10], which can be extracted from requirements at all levels and product design parameters. Belonging to the middle layer of product design quality control; The design parameter layer directly controls the design parameters of related product attributes concerned by design requirements, and controls their related characteristics, so as to achieve the requirements of controlling and ensuring product design quality. It belongs to the lowest level of product design quality control. As people gradually realize the importance of product design quality, how to effectively control it has aroused widespread concern in academia and industry. Under the influence of iso9000 series quality control and management standard system, some effective product design quality control technologies and methods have emerged. These technologies and methods are used in the hierarchical model of product design quality control.