Lean Six Sigma - Foundation

Six sigma deploys:

• process review from time to time to transform the business.

• statistical tools to identify losses and increase profitability.

• statistical tools to identify and eliminate variation.

• mathematical analysis to identify variation in the product.

One of the foundations of Six Sigma is the concept that the output of a process (Y) is influenced by the process inputs (X) and is commonly shown as which equation?

• Y = 2X

• X = Y/2

• Y = g(X+2)

• Y = f(X)

The Lean approach is to focus on removing waste while improving process flow to achieve speed and agility at lower cost.

• true

• false

The variance of process time is 16 sec². What is the standard deviation of the process time?

• 16

• 4

• 256

• 8

One of the metrics commonly used in Lean Six Sigma is DPU. This acronym stands for:

• Deferred planned usage

• Defects per unit

• Decreased production utilization

• Downtime per unit

About ______ of normally distributed data is within ± 2 standard deviations from the mean.

• 95%

• 99.73%

• 68%

• 90%

Who is the quality leader most associated with the concept of robustness?

• Juran

• Ishikawa

• Taguchi

• Feigenbaum

Customer service time at a local bank branch varies between 2 to 4 minutes. It is an example of variation in customer service timing.

• true

• false

DPMO means

• Dedicated persons with money and opportunities

• Defects per million outputs

• Defects per million opportunities

• Defected process with many opportunities

A coffee shop owner is trying to maintain the temperature of coffee between 65 °C and 85 °C. The temperature control process has a mean of 75 °C and a standard deviation of 2 °C. Calculate the Z score of the process.

• 4

• 6

• 4.5

• -5