QOM 2017 - Six Sigma - Test 2016B1 Flashcards
Doing VA/NVA analysis from a VSM have the objectives below, one is unfortunately wrong. Which one?
a. Identify and eliminate the hidden costs that do not add value for the customer
b. Reduce unnecessary process complexity
c. Reduce process steps cycle time
d. Reduce process lead time
c. Reduce process steps cycle time
Many of the metrics used for operational development is Poison-distributed that have data skewed to the right. Meaning:
a. Increased average will increase the level of the variation
b. Lower specification limit does not exist
c. Increased variation will increase the level of the average
d. Upper specification limit does not exist
c. Increased variation will increase the level of the
average
The control plan is a central delivery in the C-phase. What is NOT true about it?
a. it supports pro-activity
b. it supports pull-thinking
c. it supports prioritization of continuous
improvement activities
d. it supports visualization of process flow
d. it supports visualization of process flow
The funnel experiment, firstly proposed by Deming, shows that:
a. If the natural variation of the process is too big, try to make adjustments
b. Common causes of variation are not eliminable
c. If the natural variation of the process is too big, there is nothing to do
d. You cannot reduce the variation of a process by
continuously tampering it
d. You cannot reduce the variation of a process by
continuously tampering it
When testing whether X and Y variables have a correlation
different than zero (H0: rxy is zero) based on a sample of 30 units (n=30), one obtained a p-value of 0.50. What can we say about the correlation of two variables?
a. The correlation between x and y has been proven to be non-zero based on the sample.
b. The correlation between x and y has been proven to be zero based on the sample.
c. The correlation between x and y is unknown, more evidence is needed.
d. If the null hypothesis is true, the correlation between x and y is 0.50.
c. The correlation between x and y is unknown, more evidence is needed.
Process capability is used to relate VOP with VOC. Cp and Cpk are two basic measures. What is correct about this using the standard definitions?
a. Cp>Cpk
b. Cp = (UCL - LCL) / 6σ, where σ is the estimate of process standard deviation, where CL is upper and lower control limits
c. When Cpk is high (>1) and Cp low (<1), the
process is capable but off-target
d. When Cp is high (>1), the process has the
potential to be capable
d. When Cp is high (>1), the process has the
potential to be capable
The purpose using potential-FMEA in a Six Sigma project is:
a. To create a list of underlying factor that might
influence the variation in y
b. To visualize the status of controlling the
influential factors in the underlying system of y
c. To sort out all relevant factors influencing
variance in y (VOC)
d. To create a basic document as input for audit
b. To visualize the status of controlling the
influential factors in the underlying system of y
To apply the Analysis of variance (ANOVA), we have to:
a. check the assumptions for the application of the model
b. compare more than three treatments
c. find significant evidence of different treatments
d. none of the above
a. check the assumptions for the application of the
model
Which of the following method does not use hypothesis testing?
a. DoE
b. General linear model
c. FMEA
d. SPC
c. FMEA
All of the following experimental designs could be used to investigate interactions EXCEPT
a. half-fraction
b. half-fraction with replication
c. full-factorial with replication
d. saturated screening with replication
d. saturated screening with replication
The purpose of adding center points in the sequential experimental design is
a. To decrease influence of noise
b. To build response surface models
c. To sort out interactions
d. To check for curvature
d. To check for curvature
