关于6 Sigma与3 Sigma的比较

Comparison Between 6 Sigma and 3 Sigma

在企业推广6σ的过程中,经常有学员不明白为什么6σ比3σ好,甚至有人会说6σ的规格限比3σ的规格限宽,当然6σ的合格率比3σ的合格率高。本文认为文献[1]、[2]关于6σ与3σ的比较图是引起这种误会的根源。为此本文给出另外的比较和解释。

In the progress of 6σ＇s popularization in enterprises, some students very often can＇t understand why 6σ is better than 3σ, and even think the specification limit ofσis wider than 3σ＇s so that the 6σhas high pass rate. This paper considers that comparison table showed by reference [ 1 ]and[2] leads to that misunderstandings. So, the paper gives another comparison and interpretation.