摘要:产品的质量是生产出来而非检验出来的,因此产品生产过程中的各个制造和生产阶段都需要实时监控,并且根据各阶段的数据进行量化生产质量控制。本文针对A企业手机的装配合格率,采用数理统计工具对生产过程中收集的数据进行加工和处理,并且深入分析造成产品装配不良的原因。针对不良品数,采用p控制图和针对二项分布的过程能力分析。文中由于产品不良率较低,p控制图无法灵敏的检出异常,还采用了累计和控制图,对不良数据进行进一步分析。在案例分析时,发现了传统的休哈特控制图与累计和控制图的互补效果。同时通过5W1E方法,确定了引起包装质量问题的主要因素,并提出了改善建议。
关键字:质量管理;统计过程控制;P控制图;CUSUM控制图
The Application of SPC in the Quality Improvement of Mobile Phone Assembly Industry
Abstract:Quality of the product is manufactured, rather than tested, hence, it is necessary to monitor various manufacturing and production stages of the production process and quantify the data of the various stages.
In this paper, according to the assembly pass rate of mobile phone of packaging process, the data collected in the production process are analyzed by mathematical statistical tools, and the reason of assembly failure is analyzed deeply. 5M1E is used to analyze the cause of adverse factors comprehensively, and for the main factors further analysis and improvement will be done. For the defective number, the P control chart and the process capability analysis for the binomial distribution are used. In this paper, due to the low product defect rate, P control chart cannot be sensitive to the detection of abnormalities, so the CUSUM control chart is used to do further analysis.
In the case analysis, we find the complementary effect of the traditional Shewhart control chart and the CUSUM chart. At the same time, through 5W1E, the main factors that cause the quality of packaging are determined, and suggestions for improvement are put forward.
Keywords: quality management; statistical process control; P control chart; CUSUM control char
目录
0引言 1
1A企业简介和质量现状 2
2SPC基本理论以及分析方法 5
2.1 SPC概述以及P控制图介绍 5
2.2控制图设计原理 6
2.3CUSUM控制图介绍 8
3SPC在A企业产品生产的应用 10
3.1数据搜集 10
3.2P控制图分析数据 12
3.3CUSUM控制图分析数据 15
3.4分析主要不良因素 19
3.5质量改进方案 22
结论 24
致谢 25
参考文献 26
SPC在A企业手机装配质量提升中的应用
0引言
现在的手机不仅仅是单一的通讯工具,已经成为一个集合多媒体和信息的终端设备。在智能机时代,由于企业分工加快了生产效率,手机代工厂便由此而生。A企业就是一家OEM(OriginalEquipmentManufacturer)性质的手机代工厂。OEM是指品牌公司负责研发以及设计,代工厂负责生产以及加工的模式。作为代工厂,要面对降低生产成本、加快市场反应速度和提髙产品质量的三重压力,而在任一方面的疏忽都有可能让企业陷入困境.这就要求制造企业更加重视生产过程的控制,有力地协调好三者间的关系,这样,企业才能在激烈的市场竞争中生存下来[1]。