Question

Q1. Part A. The manager of the Scissors Department walks into your office. His needs are simple. Due to staffing levels, he wants his day shift to inspect 30 scissors, his evening shift 25 scissors and his midnight shift 20 scissors. They are asked to count the number of scratches on each pair of scissors. He tells you that typically there are 14 scratches on each pair of scissors and wants the control limits applicable for each shift’s inspection totals.

Part B. That afternoon he returns and asks you to also calculate the limits for a control chart where he takes the number of scratches for the entire day, that is, 75 scissors are inspected each day. He reminds you that there are 14 scratches on each pair of scissors.

Answer 1