Operations Management in the Supply Chain: Case Study (Toledo Custom Manufacturing: Quality Control)

Toledo custom manufacturing samples produced.

Operator 1-machine 1

sample 1: 0.500 0.498 0.502 0.499 0.503

sample 2: 0.496 0.497 0.500 0.502 0.499

sample 3: 0.504 0.503 0.503 0.496 0.495

sample 4: 0.503 0.501 0.498 0.497 0.500

sample 5: 0.500 0.502 0.503 0.498 0.495

sample 6: 0.505 0.496 0.504 0.503 0.502

Operator 2-machine 2

sample 1: 0.495 0.497 0.495 0.502 0.500

sample 2: 0.505 0.510 0.503 0.511 0.504

sample 3: 0.504 0.503 0.502 0.502 0.501

sample4: 0.500 0.501 0.497 0.496 0.504

sample 5: 0.501 0.512 0.510 0.508 0.504

sample 6: 0.503 0.500 0.497 0.496 0.504

1. Calculate the control charts (UCL,CL, and LCL) for each operator-machine combination separately. Do this for both x-bar (average) and range charts. What conclusions can you draw from the charts about each operator-machine combination?

2. What should be done based on the calculations from question 1?

3. What is the process capability for each operator-machine combination?

4. Can you be sure that every part produced by in-control processes will meet the specification?

5. Identify and explain why and underlying assumptions for the calculations done here.