There are many differences between the different philosophies use by Six Sigma, but just because one of them is called Lean doesn't mean that it is any less successful than the other practices that Six Sigma uses to develop ideas for successful companies. To some people, the word Lean means cutting fat in order to water down a philosophy and that is what many businesses are using in these days of economic troubles but the Lean method practiced by Six Sigma is simply a way of making things a lot more simple and a lot of companies are benefiting from it.
In six sigma, the emphasis is to recognize and eliminate defects and or low profit margins. They recognize that variations in analyzing and measuring can hinder or often block the ability to deliver high quality services. Six sigma requires the data to be looked at and changed through improvements by brainstorming where and what can be improved. Six sigma provides a team of professionals to assist in planning, implementing, and finally improving the businesses overall profit margin by eliminating the defects that caused the profit margin to drop.
In the lean version of six sigma, the focus is on maximizing products such what's seen at a car manufacturer. Car manufacturers have several vehicles on the production line everyday. One can just imagine how much money rests on the production line, and how costly one mistake could be. Lean stresses reducing waste. If a certain amount of waste is reduced, per car, much money could be saved when that is multiplied by how many cars are produced each day.
There is also a focus on inventory and that just doesn't mean the cars that are already on the production line but also on the cars that are still a figment on a person's imagination. Parts have to be ordered and the idea has to be implemented before the final product is produced.
The lean version looks at overproduction such as a car manufacturer would look at an excess of a particular vehicle; the company would have to find ways to sell off these cars before producing new ones. Both the lean and the six sigma look at the same aspects of the method but differently, six sigma focuses on the customer while the lean version focuses on waste and production.
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