Question

A call center receives 25 callers per minute on average. On average, a caller spends 1 minute on hold and 4 minutes talking to a service representative. On average, how many callers are "in" the call center

Answer 1

"125 callers" is the right answer.

Explanation:

Given values:

Arrival calls rate,

= 25 per minute

Talking time,

= 4 minutes

Hold time,

= 1 minute

The flow time will be:

=
`1 \ minute \ + 4 \ minutes`

=
`5 \ minutes`

Flow rate,

=
`Arrival \ calls \ rate`

=
`25 \ per \ minute`

By using the Little's law,

⇒
`WIP = Flow \ rate* Flow \ time`

By substituting the values, we get

`= 25* 5`

`=125`

Thus the above is the correct approach.