1733 - normal curve developed as an approximation to binomial distribution by Abraham de Moivre
1783 - normal curve used to describe the distribution of errors by Pierre-Simon Laplace
1809 - normal curve used to analyze astronomical data by Carl Friedrich Gauss
1924 - statistical process control launched for quality improvement by Walter A. Shewhart
1984 - internal quality research report in Motorola on the correlation between how well a product did in its field life and how much rework had been required during the manufacturing process by Bill Smith
1985 - development of a four-stage problem-solving approach: Measure, Analyze, Improve, Control (MAIC) by Mikel Harry
1987 - six sigma launched in Motorola by Bob Galvin
1991 - six sigma launched in Allied Signal by Lawrence Bossidy
1995 - six sigma launched in General Electric by Jack Welch
1783 - normal curve used to describe the distribution of errors by Pierre-Simon Laplace
1809 - normal curve used to analyze astronomical data by Carl Friedrich Gauss
1924 - statistical process control launched for quality improvement by Walter A. Shewhart
1984 - internal quality research report in Motorola on the correlation between how well a product did in its field life and how much rework had been required during the manufacturing process by Bill Smith
1985 - development of a four-stage problem-solving approach: Measure, Analyze, Improve, Control (MAIC) by Mikel Harry
1987 - six sigma launched in Motorola by Bob Galvin
1991 - six sigma launched in Allied Signal by Lawrence Bossidy
1995 - six sigma launched in General Electric by Jack Welch
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