Lean is a philosophy, methodology and science rooted in the best manufacturing know-how and can-do spirit of postwar Japan. As a holistic system, Lean is also widely known as the Toyota Production System (TPS) and proper implementation of this system has benefits both in factory operations as well as in service environments.​

 

The Six Sigma approach generates quick, demonstrable results linked to a no-nonsense, ambitious goal : To reduce defects ( and the cost they entail) to near zero by a target date. Six Sigma also:

 

• Has built-in mechanisms for holding the gains.

• Sets performance goals for everyone.

• Enhances value to the customer by exposing “defects” caused by functional bureaucracy and by encouraging managers and employees alike to focus their improvement efforts on the needs of external customers.

• Speeds up the rate of improvement by promoting learning across functions.

• Improves your ability to execute strategic changes.

 

Average and Variability 

 

Most of the issues are not addressed only by averages. Trouble is, averages can hide lots of problems. With the way that most processes operate today, if we promise customers to deliver packages within two working days of getting their order, and your average delivery time is two days, many of the packages will be delivered in more than two days. If you want all packages to be delivered in two days or less, you will have to dramatically eliminate problems and variations in your process.

 

A Six Sigma approach first improves the mean, then the variability. This pattern repeats as a process of continuous improvement.

 

 

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