Question 1
Which of the following is true regarding the process capability index C
pk?
◦ A C
pk index value of 1 is ideal, meaning all units meet specifications.
◦ The smaller the C
pk, the more units meet specifications.
◦ The larger the C
pk, the more units meet specifications.
◦ Positive values of the C
pk index are good; negative values are bad.
◦ The C
pk index can only be used when the process centerline is also the specification centerline.
Question 2
If the C
pk index exceeds 1
◦ the x-bar chart must indicate that the process is in control.
◦ σ must be less than one-third of the absolute value of the difference between each specification and the process mean.
◦ the process is capable of Six Sigma quality.
◦ the process is characterized as "not capable."
◦ the AQL must be smaller than the LTPD.
Example of the Index to External Causes.
Example of CPT conventions in the Index.
NCC MERP Index for categorizing medication errors algorithm.
Air Quality Index
Satiety Index of Different Foods Subjects
The Heat Index.