Six-Sigma has some measures which measure performance characteristics related to a process. In most of the traditional methods, exact estimation is used to assess these measures and to utilize them in practice. In this paper, to estimate some of these measures, including Defects per Million Opportunities (DPMO), Defects per Opportunity (DPO), Defects per unit (DPU) and Yield, a new algorithm ba...

OBJECTIVES To apply the Six Sigma tools of Change Acceleration Process and Work-Out and to improve patient access in an outpatient clinic in a hospital-based residency training program. STUDY DESIGN Observational study. METHODS Comparison of productivity in an obstetrics and gynecology clinic after implementation of the Six Sigma principles, with a comparable internal medicine clinic as a c...

The paper highlights the importance of employee/customer involvement in six-sigma implementation. For six-sigma a company not only needs a certain pool of resources, it also needs organizational competencies in terms of a motivated workforce and involved customers. Employee involvement leads to low worker role ambiguity, removal of cultural bottlenecks, worker empowerment, and worker motivation...

Six Sigma has been considered a powerful business strategy that employs a wellstructured continuous improvement methodology to reduce process variability and drive out waste within the business processes using effective application of statistical tools and techniques. Although there is a wider acceptance of Six Sigma in many organizations today, there appears to be virtually no in-depth case st...

the aim followed in tillage operations is the preparation of a suitable seedbed. the clod mean weight diameter (mwd) is one of the important tillage quality factors. in this study six sigma methodology was employed to improve the mwd index on the experimental farm of the university of tehran. six sigma is considered as one of the new improving process methods that has gained wide applications i...

Globalization, advancement of technologies, and increment in the demand of the customer change the way of doing business in the companies. To overcome these barriers, the six-sigma define–measure–analyze–improve–control (DMAIC) method is most popular and useful. This method helps to trim down the wastes and generating the potential ways of improvement in the process as well as service industrie...

Purpose – The purpose of this paper is to critically evaluate the contributions of six sigma methodology to the improvement of service quality. Since its development in the late 1980s, six sigma has been extensively applied in manufacturing and quasi-manufacturing settings. This study aims to explore the challenges of six sigma in reaching a much wider field of application. Design/methodology/a...