Question: Please work out by hand and explain like I'm five. A maintenance group improves the effectiveness of its repair work by monitoring the number of

Please work out by hand and explain like I'm five.

A maintenance group improves the effectiveness of its repair work by monitoring the number of maintenance requests that require a second call to complete the repair. Twenty weeks of data are shown in Table 7E.7.

(a) Find trial control limits for this process.

(b) Design a control chart for controlling future production.

Please work out by hand and explain like I'm

200 100 Second Second Total Visit Total Visit Week Requests Required Week Requests Required 1 11 1 2 2 250 8 12 100 0 3 250 9 9 13 100 1 4. 250 7 14 4 5 5 200 3 15 200 5 6 200 4 16 200 3 7 150 2 17 10 8 150 1 18 200 4 9 150 0 19 250 7 10 150 2 20 250 6 200 200

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