六西格玛在A公司紧固件改善项目中的应用研究

发布时间：2018-03-21 09:43

本文选题：六西格玛　切入点：项目管理　出处：《中国科学院大学（工程管理与信息技术学院）》2015年硕士论文　论文类型：学位论文

【摘要】：生产报废是紧固件企业大批量生产过程中面临的一个重要问题,而解决这个问题需要对各工序进行分析并逐条解决以实现降低报废率的目的。在A公司紧固件产品生产制造过程中一直以来都是纯粹的依赖于操作工的经验；而经验往往是因人而异,在改善的过程中需要进行长时间的摸索和进行多种测试,势必会在一定程度上增加产品成本,因此为了在国内外竞争环境中取得优势,提高客户满意度,A公司将推行六西格玛管理方法作为近些年的公司战略。本文针对降低A公司紧固件产品制程中的缺陷率项目为例,运用六西格玛管理的相关方法进行改善,通过对DPPM(每百万缺陷数)报表和缺陷统计报表分析,确认造成高报废率的主要原因。按照六西格玛的DMAIC改善方法5个阶段分步实施,在定义阶段成立六西格玛改善团队,进行改善的成本收益评估,完成项目立项表。在测量阶段详细分析工序流程,识别关键步骤,应用SIPOC(高端程序图)找出关键输入因子,然后通过鱼骨图法和加权排列图法对输入因子进行过滤,同时对测量系统进行评估分析,判定测量系统是否满足要求。在分析和改善阶段,首先采用假设检验分析我们在测量阶段所找到的输入因子是否合理,同时应用实验设计方法发现不同因素对应结果的效应关系,进而建立数学模型,找到适用的优化参数设置方法。在控制阶段针对改善方案进行了文件化和标准化,确保改善措施的持续实施。该六西格玛改善项目的实行取得了预期的经济效益,同时产品合格率的提升也满足了客户的期望,提高了产品竞争力和客户满意度,证明了六西格玛在公司内部具有很好的应用和推广价值。
[Abstract]:Production scrapping is an important problem in the mass production of fastener enterprises. To solve this problem, it is necessary to analyze each process and solve it one by one in order to achieve the goal of reducing the scrap rate. In the manufacturing process of fastener products in company A, it has always been purely dependent on the experience of operators. However, experience is often different from person to person. In order to gain advantages in the competitive environment at home and abroad, it is necessary to carry out a long period of exploration and a variety of tests in the process of improvement, which is bound to increase the cost of the product to a certain extent, in order to gain an advantage in the competitive environment at home and abroad. Improve customer satisfaction A will implement six Sigma management as a company strategy in recent years. Based on the example of reducing defect rate in fastener process of company A, this paper uses six Sigma management method to improve the defect rate, and analyzes the DPPM (defect per million defect) report and defect statistic report. Recognizing the main causes of the high scrap rate. In accordance with the six Sigma DMAIC improvement method, which was implemented in five stages, a six Sigma improvement team was established in the definition phase to conduct an improved cost-benefit assessment, In the measurement stage, the process flow is analyzed in detail, the key steps are identified, the key input factors are found by using SIPOC (high-end program diagram), and then the input factors are filtered by fish bone map and weighted arrangement chart. At the same time, the measurement system is evaluated and analyzed to determine whether the measurement system meets the requirements. In the stage of analysis and improvement, the hypothesis test is first used to analyze whether the input factor we found in the measurement phase is reasonable. At the same time, the experimental design method is used to find out the effect relation of the corresponding results of different factors, and then the mathematical model is established, and the suitable optimization parameter setting method is found. In the control stage, the improvement scheme is documented and standardized. Ensure the continuous implementation of the improvement measures. The implementation of the six Sigma improvement project has achieved the expected economic benefits. At the same time, the increase in the qualified rate of the products has also met the expectations of customers, improved product competitiveness and customer satisfaction, It is proved that six Sigma has good application and promotion value in the company.
【学位授予单位】：中国科学院大学（工程管理与信息技术学院）
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：F273;F416.4

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