Stephanie
Robbins is the Three Hills Power Company management analyst
assigned to simulate maintenance costs. In Section 14.6 we describe
                        the
simulation of 15 generator breakdowns and the repair times required
when one repairperson is on duty per shift. The total simulated
maintenance cost of
                        the
current system is $4,320.
                    

                        Robbins
would now like to examine the relative cost-effectiveness of adding
one more worker per shift. The new repairperson would be paid
                        $30
per hour, the same rate as the first is paid. The cost per
breakdown hour is still $75. Robbins makes one vital assumption as
she begins