英文翻译问题

The term "Six Sigma" derives from a field of statistics known as process capability studies. Originally, it referred to the ability of manufacturing processes to produce a very high proportion of output within specification.
术语“六西格玛”起源于在学习过程性能当中的统计学。原本它反映了能生产非常高比例所有满足规格的产品的能力。