The concept of improvement in the workplace began in the United States during World War II. Since then, multiple philosophies of lean manufacturing have been established. One of the most notable is Six Sigma. The concept originated with Motorola, and it was based on previous ideals. Sigma is the unit for standard deviation on a bell curve. Six Sigma encompasses over 99% of all products. If a company produces with "six sigma quality," they have, at most, 3.4 defective parts per million. Six Sigma, like its predecessors, asserts that:
However, the concepts that set Six Sigma apart from other philosophies include:
The entire task that the robot must be able to accomplish centers around the idea of Six Sigma. There must be as few defective parts within the factory as possible to optimize the team's score, or, more generally, the company's production quality. A higher quality is the result of greater efficiency, and both lead to a more successful company.