Sigma is a statistical measure of variability, typically in a given process. In manufacturing, for instance, it could be used to measure the number of sub standard products. In a service industry, it could quantify delays in delivery or other procedures.
Six sigma methodology is one of the most popular business management strategies in recent years.
First to begin with it’s important to know what six sigma is.
Six Sigma is a business strategy supported by a quality improvement strategy. Sigma has been labeled as a metric, a methodology, and now, a management system. While Green Belts, Black Belts, Master Black Belts,