Discuss the below:
Q1: What Quantitative method /technique is used to determine?
Each hour samples size n=4 are checked. After 5 hours of observing the results are below.
| Time |
Box1 |
Box2 |
Box3 |
Box4 |
| 9am |
9.8 |
10.4 |
9.9 |
10.3 |
| 10am |
10.1 |
10.2 |
9.9 |
9.8 |
| 11am |
9.9 |
10.5 |
10.3 |
10.1 |
| Noon |
9.7 |
9.8 |
10.3 |
10.2 |
| 1pm |
9.7 |
10.1 |
9.9 |
9.9 |
Q2: Using the below data, what are the limits for xbar- and R-charts, is this process in control?
| Sample Size n |
Mean Factor A2 |
Upper Range D4 |
Lower Range D3 |
| 2 |
1.880 |
3.628 |
0 |
| 3 |
1.023 |
2.574 |
0 |
| 4 |
0.729 |
2.282 |
0 |
| 5 |
0.577 |
2.114 |
0 |
| 6 |
0.483 |
2.004 |
0 |
| 7 |
0.419 |
1.924 |
0.076 |
| 8 |
0.373 |
1.864 |
0.136 |
| 9 |
0.337 |
1.816 |
0.184 |
| 10 |
0.308 |
1.777 |
0.223 |
| 12 |
0.266 |
1.716 |
0.284 |