Six Sigma is a set of techniques to improve the reliability of a manufacturing process. Ideally, all products will have the exact same specifications equivalent to what was desired, but countless imperfections of real-world manufacturing makes this impossible. The as-built specifications of a product are assumed to be centered around a mean, with each individual product deviating some amount away from that mean in a normal distribution. The goal of Six Sigma is to ensure that the acceptable specification limits are six standard deviations away from the mean of the distribution; in other words, that each step of the manufacturing process has at most a 0.00034% chance of producing a defect.
Six Sigma is a set of techniques to improve the reliability of a manufacturing process Ideally all products will have the exact same specifications equivalent to what was desired but countless imperfections of real-world manufacturing makes this impossible The as-built specifications of a product are assumed to be centered around a mean with each individual product deviating some amount away from that mean in a normal distribution The goal of Six Sigma is to ensure that the acceptable specification limits are six standard deviations away from the mean of the distribution; in other words that each step of the manufacturing process has at most a 000034% chance of producing a defect