In April $2023,$ Bed Bath & Beyond, a home goods retailer, announced that it had

filed for Chapter $11$ bankruptcy protection.

$($i$)$ Create a cause$-$and$-$effect diagram for this case.

$($ii$)$ Provide a detailed description of the most likely causes of the situation.

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:

$($i$)$ Determine the upper and lower control limits for an X$-$Bar chart and R$-$chart

with a sample size of four.