Adrian recently started working at ABC Inc. as a quality engineer. His supervisor asks him to improve the process capability index of the company's primary product. Instead of addressing the actual variation in the process, Adrian decides to simply widen the specification limits$-$raising the upper limit and lowering the lower limit$.$

As a result of this action, what happens to the process capability index?

It increases, although it's questionable whether the underlying process is actually better.

It does not change, since the process variation remains the same.

It decreases because the specification limits are now farther apart.

It depends on other factors, such as the control limits$.$

It does not change, since only a change to the control limits would cause the process capability index to change.