When we talk about "quality", what will come to your mind? Is it Nokia or iphone4 that can still be used after being dropped from the fourth floor? In fact, our concept of quality is only based on feelings. Our definition of product quality is also based on our sense of use of the product.
To help students learn quality management from a professional perspective, at 6:30 pm on December 11, at the invitation of professor Li Xiulin from the Department of Logistics Management and Engineering, Tan Pu, the logistics strategic plan manager of Bosch Power Tools (China) Co., Ltd., came to Production and Operations Management class, and gave a lecture on Quality Management in Supply Chain to Chinese and international students majoring in logistics management.
课上谭老师给同学们介绍了6 sigma管理策略。谭老师说到，质量管理的目标就是减少缺陷，因为产品缺陷给公司企业带来的损失是巨大的。产品的缺陷在直观上造成成本浪费和利润损失，还对企业的声誉造成影响。所以，“0缺陷”就是质量管理要实现的目标，也是6 sigma要实现的目标。
Tan introduced 6 sigma management strategy to the students during the class. He said that the goal of quality management is to reduce defects, because the losses caused by product defects to the company are huge. Defects in the product intuitively cause cost waste and loss of profit, and also affect the reputation of the company. Therefore, "zero defect" is the goal to be achieved by quality management, and also the goal to be achieved by 6 sigma.
6 sigma主要有两个过程，DMAIC和DMADV，这两个过程分别针对当前低于6 sigma规格的项目和达到6 sigma规格的项目。谭老师向同学们着重介绍了DMAIC的过程。DMAIC，即D（define）定义，M（measure）度量，A（analyze）分析，I（improve）改善，C（control）控制，这五个环节构成一个流程环，帮助产品提高质量，实现“0缺陷”的目标。
6 sigma mainly has two processes, DMAIC and DMADV. These two processes are respectively for projects that are currently below the 6 sigma specification and projects that reach the 6 sigma specification. Tan introduced the process of DMAIC to the students in detail. DMAIC, namely D (define), M (measure), A (analyze), I (improve), C (control), these five links form a process loop to help products improve quality and achieve "zero defect".
In class, Tan simulated making paper plane into a product manufacturing process and explained to the students what is the quality management under the 6 sigma strategy. He chose two students as quality inspectors, and the remaining students were producers of paper planes. The quality inspector's job is to strictly inspect each paper airplane, and mark each place where the paper plane is unsatisfactory and substandard, and mark it as a defect. The producer's job is to fold three paper planes in two minutes.
In the first production, 34 paper planes had 25 wing problems and 24 tail problems. Under the guidance of Tan, the students used the fishbone diagram to analyze the cause of the problem, and adopted a team-based division of labor and collaboration to carry out the second production. This time the defect rate is significantly lower than the first time. Of the 10 paper airplanes produced, there are only 5 wing problems and 3 fuselage problems. This is the quality management under the 6 sigma strategy.
Through this class, the students not only learned the 6 sigma method of quality management strategy, but also had a certain understanding of the supply chain management strategy of enterprises. What's more, Chinese and international students attended class together to experience the charm of knowledge together, and to experience different class atmosphere with students from different countries, which promotes academic exchanges between Chinese and international students.