Lean Six Sigma - Green Belt Questions With Solutions 100% Correct

Lean Six Sigma - Green Belt Questions With
Solutions 100% Correct

In Multi-Vari analysis, a graph is created that displays the possible sources of variation affecting

process output. True




The mean output of a process is the major factor in controlling that process and ensuring that it

meets process objectives. False




Both mean and standard deviation, a measure of variation, are important. Some would argue that

variation is more important than mean.




There is only one source of variation. False




There are two sources: common and special




The normal or expected cause of variation is called Common Cause. True




Special cause variation is always present. No process can avoid it. False

, Lean Six Sigma - Green Belt Questions With
Solutions 100% Correct
Common cause is always present.




Barring any accidents, the length of time it takes to commute to work is subject to common cause

variation. True




It is not possible to eliminate all common cause variation in most processes. True




There is some variation in even the most carefully designed and controlled processes.




Special cause variation is of most concern in Six-Sigma. It is unexpected and can disrupt process

output. True




Special cause variation represents the category of variation that effective Six Sigma monitoring

systems are expected to detect. True




The length of time it would take to be seen at a health care clinic, that has otherwise not expected

emergencies during the day, would be subject to special cause variation. False

, Lean Six Sigma - Green Belt Questions With
Solutions 100% Correct
Normal variation is considered common cause variation.




As long as a process is in-control and performing as expected there is not much that can be done

to eliminate common cause variation short of redesigning the entire process. True




Several people working at a call center have called to report that they are sick with the flu and

have been replaced by temporary help. Call waiting time has increased significantly. This would

be considered special cause variation since it is not inherent in the process and is not predictable.

True




The length of the vertical lines in a Multi-Vari chart represents the range of a specific variable

over a specific period such as one week. True




The longer is the vertical line in a Multi-Vari chart the lower is the "position" variation.

False




Multi-Vari charts also uncover why special cause variation occurs. False




They only help expose the presence of special cause variation they cannot determine its sources.

, Lean Six Sigma - Green Belt Questions With
Solutions 100% Correct

Multi-Vari charts also display output means. True




In a Multi-Vari chart, the range of variation is expressed along the "X" or horizontal axis.

False




The data within a vertical bar of a Multi-Vari chart is referred to as "within variation" or

"position variation." True




Multi-Vari Charts display the root cause of a problem False




This is not the purpose of a multi-vari chart




Four identical machines in a manufacturing process are operated over three shifts. A multi vari

chart would be appropriate to study the variability of each machine and then to determine which

machine contributes most of the output variation True




A multi-vari analysis is visual and uses no statistics to compare output variation. True