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