Keller, Paul
Six Sigma (Quality control standard) Service industries -- Quality control -- Statistical methods Quality control -- Statistical methods
New York [etc.] : McGraw-Hill, c2005
Books
9780071445443
George, Michael L., 1947-
Six Sigma (Quality control standard) Service industries -- Quality control -- statistical methods Quality control -- Statistical methods
New York[etc.] : McGraw-Hill, c2003
Books
9780071418218