Identify Key Quality Characteristics Of The Multi-stage Production Process

The product quality is fundamental to an enterprise, and plays an important role in the market competition. With the increasingly high demand for product quality, the product quality standards are constantly improving. Product quality depends on the raw materials and components constituting the product. Nowadays the product needs increasingly complex production process, so automated continuous production mode becomes the direction of the development of the manufacturing sector. Automated continuous production model emphasizes the integration and synergy of different production processes, interaction and impact of the relationship between the various processes. The traditional quality control techniques are only concerned about the quality control and evaluation of the single-stage production process, without taking into account fluctuations in the quality of the upstream production process downstream production process. The traditional quality control charts issue a warning, but the operator of the production process cannot be timely determine which part of the multi-stage production process error has occurred. This will make the process error unable to eliminate, and the process errors constantly passed between the production processes, resulting in process error expansion, the increase in the cost of quality control. In particular, the high degree of automation industry, control charts may appear frequent alarms. This will lead to a multi-stage production process quality control is difficult to play a role. Therefore, the traditional quality control needs to expand from a single production process for the entire production process. The quality characteristics of multi-stage production process are too many. If the enterprise controls every quality characteristic, this will cause the control of the high cost and low production efficiency. In this case, the enterprises only identify key quality characteristics of multi-stage production process in order to conduct quality control. Previous studies for the identification of the key quality characteristics, They do not have a specific analysis of the transfer relationship between multi-stage production process quality characteristics. This paper described the transitive relation of the three different structures multi-stage production process, and then establishing a relational model of the multi-stage production process quality characteristic.Though this model describes the different production process quality characteristics transitive relation, and ultimately this method can identify the key quality characteristics of the multi-stage production process.