Can you please answer each question in order and label them by their number when answering.

Challenge 1 1. Why do we need to use both X-bar and R charts together? Why can't we use one or the other? 2. What is the point of control limits, if they aren't related to quality? What do control limits tell us? Challenge 2 3. How did you know when to stop the process to make adjustments? 4. How did you determine whether it was better to make a machine recalibration or a labor substitution? Challenge 3 5. What does it mean when the control limits fall within the specification limits? Is this a good situation or a bad situation? 6. "Control limits are calculated, while specification limits are set." What does this mean