You need to decide how many machines to assign to a worker. The time to load/unload a machine is 4 minutes; then the machine spends 10 minutes running automatically.

1. In the synchronous servicing ideal case, how many machines will be assigned to one operator?
2. Assume that extra w= 1.5 minutes are needed to clean the machine in each cycle; the operator earns $18/hr and the machine cost is $15/hr.

b.1. What the cycle time if n₁ is decided?

b.2. What is the production rate if n₁ is decided?

b.3. What is the total cost if n₁ is decided?

b.4. What the cycle time if n₂ is decided?

b.5. What is the production rate if n₂ is decided?

b.6. What is the total cost if n₂ is decided?

b.7. Based on the total cost, how many machines would you assign to the operator?