The time to make beds at a motel should fall into an agreed-on range of times. A sample of four maids was selected, and the time needed to make a bed was observed on three different occasions: 11eb774b_63a2_fab5_adfc_b3617de3390c_SM3360_00 a. Determine the upper and lower control limits for an X -chart and an R -chart with a sample size of four. b. After the control chart was established, a sample of four observations had the following times in seconds: 185, 150, 192, and 178. Is corrective action needed?

Service Management 7th Edition by James Fitzsimmons, Mona Fitzsimmons

النسخة 7الرقم المعياري الدولي: 9780071289276

Service Management 7th Edition by James Fitzsimmons, Mona Fitzsimmons

النسخة 7الرقم المعياري الدولي: 9780071289276

تمرين 7

The time to make beds at a motel should fall into an agreed-on range of times. A sample of four maids was selected, and the time needed to make a bed was observed on three different occasions:

a. Determine the upper and lower control limits for an X -chart and an R -chart with a sample size of four.
b. After the control chart was established, a sample of four observations had the following times in seconds: 185, 150, 192, and 178. Is corrective action needed?

التوضيح

موثّق

a.
The service time taken by four maids ...