Lean Six Sigma Master Black Belt: LSSMBB

Your team has done a SOV study and produced the following Multi-Van chart. What is the largest source of variation?

A. Time to Time

B. Within Unit

C. Unit to Unit

D. None of the above

A black belt at a call center is reviewing the length of calls, as shown below. The phone call length is not to exceed 4 minutes. Is the call-in-process capable?

A. Yes, the data is from a stable population.

B. No, many calls exceed the specification.

C. Unsure, more data is needed.

D. Yes, all the calls meet specification.

Which statements are correct about the advanced Capability Analysis shown here? (Note: There are 3 correct answers).

A. This is a Poisson Capability Analysis

B. The average DPU with 95% confidence is between 0.024 and 0.0295

C. The DPU does not seem to vary depending on sample size

D. The process shows only one instance of being out of control statistically so we have confidence in the estimated DPU of this process

E. The maximum DPU in one observation was nearly 0.0753