A Bank of 10 Machines Requires Regular Periodic Service

question 37

Multiple Choice

A bank of 10 machines requires regular periodic service. Machine running time and service time are both exponential. Machines run for an average of 44 minutes between service requirements, and service time averages six minutes per machine. If operators cost $15 per hour in wages and fringe benefits and machine downtime costs $75 per hour in lost production, what is the optimal number of operators for this bank of machines?

• A)1
• B)2
• C)3
• D)4
• E)5

---

Definitions:

Socialist Government

A form of government where the means of production, distribution, and exchange are owned or regulated by the community as a whole.

Differential Fertility

Variations in fertility rates among different population groups, often influenced by socio-economic, cultural, or demographic factors.

Middle-Class

A social group between the working class and upper class, characterized by moderate income and educational attainment.

Lower-Class

A social group that is situated at the bottom of a society's hierarchy, often associated with lower income and limited access to resources and opportunities.