Introduction of DFSS and QFD
Happy new year, begin with the new course "Product Excellence using Six Sigma" (PEUSS), at first I think the course is quite similar to the PIUSS previous course. However, after the introductory class on Monday, I realized that the content of the cours is very different.
The PEUSS seems to focus on Design for Six Sigma (DFSS) which is the methodology that be used for applying in creating new products, processes, or even service. The DFSS is using the concept of DMADV (define, measure, analyze, design, and verify), while the classic six sigma using the concept of DMAIC (define, measure, analyse, improve, and control). The different between the DFSS and the classic six sigma is that the DFSS is used for applying in the new things, while the classic six sigma is using for an improvement in existing products, processes, and service. However, from my research, it is significant to know that DFSS also can be used to apply in the existing product, and process too.
Moreover, for the yesterday class with Paul about QFD or the Quality function deployment, I think it was an interesting workshop. it is a necessary tool for DFSS. As the DFSS methodology tends to focus customer needs and wants, the QFD is created to be the tool to help the company with new products, processes, and service be able to meet the customer requirements. However, in the real- world business, it seems like most of companies are not using the QFD. WHY?? it is because doing the QFD is very time consuming and also expensive. Due to in order to get the voice of customers, the companines have to do researches (such as creating focus groups, and interviews). Nevertheless, in my opinion, i think it is better for the company to spend their large amount of time and money on doing the QFD because I think it would be better than their new products, processes, or services failed. This is because if the companies not decide to pay at the first glance for the QFD, they also have to pay later for doing the classic six sigma for improving and solving their issues on the products.
In addition, another problem for doing the DFSS (or even the QFD) is communication problem. It is nearly impossible for one person to transmit a sentence to another ten to twenty people and come up with the exact words and sentence. This is because each person listen and interpret differently. It is same as a process in a company. When the company makes a research or listen to the voice of customers, each department understand differently and convey in the different way/ information. Therefore, it is quite hard for the design team/ company to come up with a new product, process, or service to come up with the exact outcome that meet all customer requirements.