Continuing from the Three Coffee shop example above, management collected two

successive samples as follows: $3\mathrm{.}2$ and $3\mathrm{.}0$ minutes, respectively. What should

managers do$?$

Explore the assignable causes and implement corrective actions to avoid the

same errors.

Nothing; the process is in control.

Collect more sample data and redefine the control limits to adopt the positive

trend for quality improvement.

None of the above.