What does the 6 in Six Sigma stand for?

Six Sigma stands for 6 standard deviations (6σ) between avarage and acceptable limits. LSL and USL stand for “Lower Specification Limit” and “Upper Specification Limit” respectively. Specification Limits are derived from the customer requirements, and they specify the minimum and maximum acceptable limits of a process.

What is the meaning of Sigma in Six Sigma?

Sigma represents the population standard deviation, which is a measure of the variation in a data set collected about the process.

What is the origin of Six Sigma?

The roots of Six Sigma as a measurement standard can be traced back to Carl Friedrich Gauss (1777-1855) who introduced the concept of the normal curve. Many measurement standards (Cpk, Zero Defects, etc.) later came on the scene but credit for coining the term “Six Sigma” goes to a Motorola engineer named Bill Smith.

Who came up with 6 Sigma?

Bill Smith
Where Did Six Sigma First Get Used? At Motorola in the 1980s, Mikel Harry and Bill Smith developed Six Sigma to make improvements on the manufacturing floor. Motorola was among the first recipients of the Malcolm Baldrige Award.

What is USL and LSL?

LSL stands for Lower Specification Limit and USL stands for Upper Specification Limit.

What is Six Sigma and why is it important?

Six Sigma is a method that provides organizations tools to improve the capability of their business processes. This increase in performance and decrease in process variation helps lead to defect reduction and improvement in profits, employee morale, and quality of products or services.

What are the eight wastes?

Here are the 8 Wastes of Lean Manufacturing:

• Transport. The transport waste is defined as any material movement that doesn’t directly support immediate production.
• Inventory.
• Motion.
• Waiting.
• Overproduction.
• Over-processing.
• Defects.
• Unutilized talent.

What is Cpk formula?

A proper centered process will have Cp = Cpk. An estimate for Cpk = Cp(1-k). Since the max value for k is 1.0, so the value for Cpk will always be less or equal to Cp. Input is required from the customer regarding the lower specification limit (LSL) and the upper specification limit (USL).

What is UCL and LCL?

UCL = Upper Control Limit. LCL = Lower Control Limit. Control Limits are calculated based on the amount of variation in the process you are measuring.