Operations modeling (Quiz II)

Which factor differentiates the probabilistic EOQ model from the deterministic EOQ model?

• a) Constant demand

• b) Variable lead time demand

• c) Fixed ordering cost

• d) Zero holding cost

• a

• b

• c

• d

Which distribution is commonly used to model lead time demand in a probabilistic EOQ model?

• a) Uniform distribution

• b) Normal distribution

• c) Exponential distribution

• d) Binomial distribution

• a

• b

• c

• d

In a continuous review model, inventory levels are monitored:

• a) At fixed intervals.

• b) Continuously.

• c) Only at the end of the year.

• d) After a fixed amount of units are sold.

• a

• b

• c

• d

What are the basic elements of a queueing system?

• a) Arrival rate, service rate, and number of servers.

• b) Demand, supply, and lead time.

• c) Ordering cost, holding cost, and shortage cost.

• d) Fixed cost, variable cost, and total cost.

• a

• b

• c

• d

The average number of customers in the system is denoted by:

• a) Ls

• b) Lq

• c) Ws

• d) Wq

• a

• b

• c

• d

The average time a customer spends in the queue is denoted by:

• a) Ls

• b) Lq

• c) Ws

• d) Wq

• a

• b

• c

• d

The arrival rate is typically denoted by:

• a) μ

• b) λ

• c) ρ

• d) S

• a

• b

• c

• d

The service rate is typically denoted by:

• a) μ

• b) λ

• c) ρ

• d) S

• a

• b

• c

• d

The Poisson distribution is used to model:

• a) Service times.

• b) Arrival rates.

• c) Inventory levels.

• d) Lead times.

• a

• b

• c

• d

In an M/M/c queue, 'c' represents:

• a) Arrival rate.

• b) Service rate.

• c) Number of servers.

• d) Utilization rate.

• a

• b

• c

• d