This chapter is from the book ï. Using Mixed Cell References. A mixed cell reference is either an absolute column and relative row or absolute row and relative column. When you add the $ before the column letter you create an absolute column or before the row number you create an absolute row.
Six Sigma was popularized in the late 1990's and introduced into 3M by former CEO James McNerney, a former GE executive. It involves a set of process tools designed to eliminate production defects and wastage, and raise efficiency. The Six Sigma process killed innovation at 3M, said Nicholson.
In the late 1980s, Six Sigma came along. It was an offspring of the capability study used in SPC. Itâs taken on a life of its own and is very popular today. Legend has it that an engineer from Motorola came up with the idea that if a four sigma process capability was good, a six sigma capability would be even better.