Single$-$Server Waiting Line System

Effect of Operating Characteristics $(2$ of $7)$

Manager wishes to test several alternatives for reducing customer waiting time:

Addition of another employee to pack up purchases

Addition of another checkout counter.

Alternative $1$: Addition of an employee $($raises service rate from $=30$ to $=40$ customers per hour$).$

Cost $$150$ per week,

Avoids loss of $$75$ per week for each minute of reduced customer waiting time.