Construct Six Sigma DMAIC Improvement Model for Manufacturing Process Quality of Multi-Characteristic Products

Abstract

After a product has undergone a manufacturing process, it usually has several important quality characteristics. When the process quality of all quality characteristics meets the requirements of the quality level, the process quality of the product can be guaranteed to satisfy customers’ needs. A large number of studies have pointed out that good process quality can raise product yield and product value; at the same time, it can reduce the ratio of rework and scrap, achieve the effect of energy saving and waste reduction, and contribute to the sustainable operation of enterprises as well the environment. Since the six sigma method combines the statistical analysis method of manufacturing cost and production data, it is a useful tool for process improvement and process quality enhancement. Therefore, this paper adopted the six sigma-define, measure, analyze, improve and control (DMAIC) improvement process to lift the manufacturing process quality of multi-characteristic products. Besides, the Taguchi process capability index is one of the commonly used tools for quality assessment in the industry. Not only can it reflect the process loss, but it also can ensure the process yield when the index value is large enough. Consequently, this paper discussed the relationship between the Taguchi process capability index and the six sigma quality level. Meanwhile, the entire six sigma DMAIC improvement process was built on the basis of the process capability index and developed by the method of statistical quality control. Hence, the proposed method is very convenient for process engineers to apply, as well as is helpful for enterprises to move toward the goal of smart manufacturing and sustainability.

The Six Sigma Approach Improves Teacher Instruction Quality Through Quadruple Helix Model Expectations

“…Although there are studies evaluating the quality of teaching abroad, the findings of these studies focus more on measuring the quality of teaching in Higher Education Institutions (HEIs) (Ashwin, 2022;Ekawati et al, 2022;MacIel-Monteon et al, 2020;Wang, 2022) Six Sigma Approach in Teacher Teaching Quality Six Sigma is a methodology in the field of total quality management (TQM) (Kamran Moosa and Ali Sajid, 2010) and a concept of quality management towards customer-oriented continuous improvement. Six Sigma is also a technique and tool for solving problems, improving results, and reducing product damage (Yu et al, 2022). Six Sigma has been used by most companies around the world, starting at Motorola in 1985 by Bill Smith, who was an engineer at the company (Pyzdek and Keller, 2018).…”

“…This is because the Six Sigma approach is deemed able to help teachers identify the root of the problems encountered in implementing teaching and learning and offer continuous improvement methods to help teachers improve the quality of teaching. In addition, one of the concepts of Six Sigma according to Yu et al (2022) and Sandu and Sharma (2020) is to eliminate the cause of the defect the Six Sigma approach is used when the cause of the problem is not found to improve a critical process. Therefore, the application of Six Sigma in schools to improve the quality of teacher teaching is appropriate.…”

Construct the Optimum Process Model for Transistor Gaskets with Six-Sigma DMAIC

“…Based on the concept of Yu et al [13], the coordinate point corresponding to the upper confidence limit of process capability index C pkh is the measurement coordinate point (x h , y h ), h = 1, 2, 3, 4, 5 as follows:…”

“…Not only can this process capability analysis chart measure the process quality, but it also can analyze whether the process defect is caused by excessive process variation or process deviation, providing engineers with suggestions and directions for process improvement [11,12]. Therefore, many studies have applied the process capability index to the process capability analysis chart as one of the tools which promote the improvement process of the six-sigma DMAIC method [13][14][15].…”

Lifetime Performance Evaluation of Electronic Products with Censored Data

“…As global warming increases the importance of energy conservation and environmental protection issues, firms must attend to environmental issues while pursuing economic growth [1][2]. This trend has brought the concept of a circular economy (CE) into focus.…”