A paired-test method to verify service speed improvement in the Six Sigma approach: a restaurant's case study

摘要

The current study aims to propose a paired-test method of order statistics which is a non-parametric statistics approach to compensate for the academic gap in the measure step of Six Sigma projects. Another aim of this paper is to present a case study regarding a campus restaurant to demonstrate the application of the proposed method and Six Sigma processes. The theoretical basis of the proposed method was presented and new Six Sigma define-measure-analyse-improve-measure-control processes were conducted. The proposed method can effectively identify the improvement effectiveness of service speeds before and after Six Sigma project execution. The Six Sigma processes can be applied by other industries for problem-solving.