You have just used the capability index (Cpk) formulas to compute the two values "min [2, 2.5]." Which of the following is the proper interpretation of these numbers? Group of answer choices

a. The true capability index value is between 2 and 2.5.
b. The mean of the production process has shifted to the left of the design limits.
c. The mean has not shifted at all.
d. The mean of the production process has shifted to the right of the design limits.
e. The true capability index value is 2.5.

Consumers as we all know have various preferences and tolerance ranges. For this reason it is important for producers to be able to know which products to produce to meet the expectations of customers. This is where the Process capability index (Cpk) tool comes in. It is a statistical tool that can measure the capability of a producer to produce goods within the consumers range.

Coming back to the current Scenario, when the Cpk values of min [2, 2.5] are seen this means that the mean of the production process has shifted to the left of the design limits.