Note: To receive full credit, each outcome should include the full QC diagram and UCLs/ LCLs, Feel free to useQM for Windows or QM for Excel – these programs make the assignment relatively straightforward. In addition, a professional presentation of findings is expected.

Lastly, please identify your answer in yellow.

Problem #2

The registrar of a New England College receives a certain number of complaints each week about student registrations. Determine three sigma control limits using the following data. Present your control chart and briefly discuss if the process is in control:

Week 1      2        3 4      5       6 7 8      9 10 11 12 13 14

# of Complaints 5 11 17 8      6       8 11 14 4 5 10 7 8 9

Problem #3

Bags of pretzels are sampled to ensure proper weight. The overall average for the samples is 10 ounces. Each sample contains 30 bags. The standard deviation is estimated to be 4 ounces. With a 99.7% confidence interval, develop a control chart with upper and lower control limits. Briefly discuss your findings.

Problem #4

The inspection of cans of juice involves sampling some cans and weighing them. The overall average for the samples is 42 ounces. Each sample contains 39 cans. The standard deviation is estimated to be 3 ounces. With a 99.7% confidence interval, develop a control chart with upper and lower control limits. Briefly discuss your findings.

Problem #5

Set up your own statistical process control application from your current work environment (or one you are familiar with) using one Range chart, one X bar chart, one p chart and one C chart. Feel free to fabricate your own data to develop the models. Lastly, provide a brief description of your application and a brief conclusion of findings.