DeVry GSCM 326 Week 7 Case Study
Question # 1) Calculate X-Bar-Bar, R-Bar, and associated control limits using the data in the table above.
Question # 2) Create X-Bar and R (Average & Range) Control Charts from the data in table above.
Question # 3) Discuss notable out-of-control conditions displayed in the completed X-Bar and R Control Charts. Only consider points outside the Control Limits. Do not consider runs, set of points within certain zones, etc.
Question # 4) If the conditions you note could be defined as assignable conditions and they are removed from the process, what will happen to the X-Bar and R Control Chart?
- Remove the data related to the out-of-control points you observed from the original data and recalculate a new X-Bar-Bar, R-Bar, and associated control limits.
- Create new X-Bar and R Control Charts from your updated data.
Question # 5) Discuss how the two sets of Control are different. What has changed?