Quality capability ranking of material production lines —Theory and practice
SU Hang1,2, PAN Tao1,2, LI Hao2
1. Institute of Structural Steels, Central Iron and Steel Research Institute, Beijing 100081, China; 2. Beijing Matdao Technology Co., Ltd., Beijing 100081, China
Abstract：Traditional quality evaluation standard is whether it is "qualified" or not, and the quality difference above the threshold is ignored,which is an important factor causing the quality dilemma of winning the bid at a low price in recent years. Quality capability ranking of material production lines is to change the standard threshold evaluation into quality capability ranking evaluation, which may give top level enterprises a new quality target after 100% qualified,and meet the differentiated needs of users. By establishing quality capability ranking evaluation model including value function, process evaluation and quality inheritance model with the support of expert experience, quality capability ranking of material production lines adopts the key quality factors evaluation and product big data, so that the quality differences of "qualified" products can be distinguished, which may truly and comprehensively reflect the product quality capability of different production lines. The key technologies include three groups of models,in which value function model changes the traditional pass-or-not evaluation into continuous evaluation,process evaluation model extends the traditional sample evaluation to process capability evaluation,and quality inheritance model introduces the role of raw materials which is missing in traditional evaluation. Objective data are used in all models. At present,quality capability ranking has been carried out for many kinds of steel products according to the requirements of users,such as medium heavy plate,and T/CISA association standards have been released as the first standards about quality capability ranking. Quality capability ranking is first proposed and applied in the field of iron and steel materials. It has good applicability to the typical production process of products with raw materials and supporting production processes. Quality capability ranking can be further extended to the raw material industry and equipment manufacturing industry other than iron and steel materials.
苏航, 潘涛, 李灏. 钢铁材料产线质量能力分级——理论与实践[J]. 钢铁, 2021, 56(12): 103-108.
SU Hang, PAN Tao, LI Hao. Quality capability ranking of material production lines —Theory and practice[J]. Iron and Steel, 2021, 56(12): 103-108.
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2021, Vol. 56 
