Question

Peter​ Ittig's department​ store, Ittig​ Brothers, is​ Amherst's largest independent clothier. The store receives an average of 6 returns per day. Using z​ = 3​, the control chart limits​ are: The type of control chart that is best to monitor this process is __.

Answer 1

The type of control chart that is best to monitor this process is C-chart.

Explanation:

C-chart helps in determining whether the defects or returns are within the control limits or not.

Given:

Mean = average = 6 per day

Z=3

UcL = mean + 3[square root of mean]

      = 6 + 3 (Sq root of 6)

UcL = 13.34

LcL= mean - 3[ square foot of mean] = - 1.34

LcL= -1.34

So the returns are within the control limits.