Process capability a. exists only in theory; it cannot be measured. b. is assured when the process is statistically in control. c. exists when cpk is less than 1.0. d. means that the natural variation of the process must be small enough to produce products that meet the standard.

D.

Explanation:

Process capability means the ability to do a particular work without producing or producing less defects. Is defined as the inherent variability of a characteristic of a product.

It represents the performance of the process over a period of stable operations. A process is said to be capable when the output always conforms to process satisfactions.

It measures the goodness of a process comparing the voice of the process with the voice of the customer.

Process capability analysis helps to determined the ability to manufacture parts within the tolerance limits and engineering values.