According to the global company profile, Amazon.com's advantage in inventory management comes from its almost fanatical use of economic order quantity and safety stock calculations.
Answer: FALSE
A major challenge in inventory management is to maintain a balance between inventory investment and customer service.
Answer: TRUE
Which item to order and with which supplier the order should be placed are the two fundamental issues in inventory management
Answer: FALSE
4) One function of inventory is to take advantage of quantity discounts.
Answer: TRUE
Work-in-process inventory is devoted to maintenance, repair, and operating materials.
Answer: FALSE
Which of the following statements regarding Amazon.com is FALSE?
A) The company was opened by Jeff Bezos in 1995.
B) The company was founded as, and still is, a "virtual" retailer with no inventory.
C) The company is now a world-class leader in warehouse
B) The company was founded as, and still is, a "virtual" retailer with no inventory.
Which of the following is a function of inventory?
A) to decouple various parts of the production process
B) to provide a selection of goods for anticipated customer demand and to separate the firm from fluctuations in that demand
C) to take advantage of
E) All of the above are functions of inventory
Which of the following would NOT generally be a motive for a firm to hold inventories?
A) to decouple various parts of the production process
B) to provide a selection of goods for anticipated customer demand and to separate the firm from fluctuations in
D) to minimize holding costs
Which of the following is NOT one of the four main types of inventory?
A) raw material inventory
B) work-in-process inventory
C) maintenance/repair/operating supply inventory
D) safety stock inventory
E) finished-goods inventory
D) safety stock inventory
1) ABC analysis classifies inventoried items into three groups, usually based on annual units or quantities used.
Answer: FALSE
2) In ABC analysis, "A" items are the most tightly controlled.
Answer: TRUE
3) ABC analysis is based on the presumption that carefully controlling all items is necessary to produce important inventory savings.
Answer: FALSE
4) Cycle counting is an inventory control technique exclusively used for cyclical items.
Answer: FALSE
5) One advantage of cycle counting is that it maintains accurate inventory records.
Answer: TRUE
6) In cycle counting, the frequency of item counting and stock verification usually varies from item to item depending upon the item's classification.
Answer: TRUE
7) Retail inventory that is unaccounted for between receipt and time of sale is known as shrinkage.
Answer: TRUE
8) Which of the following statements about ABC analysis is FALSE?
A) ABC analysis is based on the presumption that controlling the few most important items produces the vast majority of inventory savings.
B) In ABC analysis, "A" items should have tighter
D) ABC analysis is based on the presumption that all items must be tightly controlled to produce important cost savings.
All EXCEPT which of the following statements about ABC analysis are true?
A) In ABC analysis, inventory may be categorized by measures other than dollar volume.
B) ABC analysis categorizes on-hand inventory into three groups based on annual dollar volume.
D) ABC analysis suggests that all items require the same high degree of control.
ABC analysis is based upon the principle that:
A) all items in inventory must be monitored very closely.
B) there are usually a few critical items, and many items that are less critical.
C) an item is critical if its usage is high.
D) more time should be
B) there are usually a few critical items, and many items that are less critical.
ABC analysis divides on-hand inventory into three classes, generally based upon which of the following?
A) item quality
B) unit price
C) the number of units on hand
D) annual demand
E) annual dollar volume
E) annual dollar volume
Cycle counting:
A) is a process by which inventory records are verified once a year.
B) eliminates annual inventory adjustments.
C) provides a measure of inventory turnover.
D) assumes that all inventory records must be verified with the same frequency.
E
B) eliminates annual inventory adjustments.
Which of the following statements regarding control of service inventories is TRUE?
A) Service inventory is a fictional concept, because services are intangible.
B) Service inventory needs no safety stock, because there's no such thing as a service stocko
C) Effective control of all goods leaving the facility is one applicable technique.
Among the advantages of cycle counting is that it:
A) makes the annual physical inventory more acceptable to management.
B) does not require the detailed records necessary when annual physical inventory is used.
C) does not require highly trained people.
D) allows more rapid identification of errors and consequent remedial action than is possible with annual physical inventory.
The demand for automobiles would be considered as independent demand.
Answer: TRUE
Insurance and taxes on inventory are part of the costs known as setup or ordering costs.
Answer: FALSE
Which of the following is an element of inventory holding costs?
A) housing costs
B) material handling costs
C) investment costs
D) pilferage, scrap, and obsolescence
E) All of the above are elements of inventory holding costs.
E) All of the above are elements of inventory holding costs.
Which category of inventory holding costs has a much higher percentage than average for rapid-change industries such as PCs and cell phones?
A) housing costs
B) material handling costs
C) labor cost
D) investment costs
E) pilferage, scrap, and obsolescenc
E) pilferage, scrap, and obsolescence
If setup costs are reduced by substantial reductions in setup time, the production order quantity is also reduced.
Answer: TRUE
The EOQ model is best suited for items whose demand is dependent on other products.
Answer: FALSE
In the simple EOQ model, if annual demand were to increase, the EOQ would increase proportionately.
Answer: FALSE
At the economic order quantity, holding costs are equal to product costs.
Answer: FALSE
In the simple EOQ model, if the carrying cost were to double, the EOQ would also double.
Answer: FALSE
In the production order quantity (POQ) model, inventory does not arrive in a single moment but flows in at a steady rate, resulting in a larger production/order quantity than in an otherwise identical EOQ problem.
Answer: TRUE
The reorder point is the inventory level at which action is taken to replenish the stocked item.
Answer: TRUE
In the quantity discount model, it is possible to have a cost-minimizing solution where annual ordering costs do not equal annual carrying costs.
Answer: TRUE
In the quantity discount model, the cost of acquiring goods (product cost) is not a factor in determining lot size.
Answer: FALSE
The two most basic inventory questions answered by the typical inventory model are:
A) timing of orders and cost of orders.
B) order quantity and cost of orders.
C) timing of orders and order quantity.
D) order quantity and service level.
E) ordering cost
C) timing of orders and order quantity.
A certain type of computer costs $1,000, and the annual holding cost is 25% of the value of the item. Annual demand is 10,000 units, and the order cost is $150 per order. What is the approximate economic order quantity?
A) 16
B) 70
C) 110
D) 183
E) 600
C) 110
Most inventory models attempt to minimize:
A) the likelihood of a stockout.
B) the number of items ordered.
C) total inventory-based costs.
D) the number of orders placed.
E) the safety stock.
C) total inventory-based costs.
In the basic EOQ model, if the cost of placing an order doubles, and all other values remain constant, the EOQ will:
A) increase by about 41%.
B) increase by 100%.
C) increase by 200%.
D) increase, but more data is needed to say by how much.
E) either inc
A) increase by about 41%.
In the basic EOQ model, if D = 6000 per year, S = $100, and holding cost = $5 per unit per month, what is the economic order quantity?
A) 24
B) 100
C) 141
D) 490
E) 600
C) 141
Which of the following statements about the basic EOQ model is TRUE?
A) If the ordering cost were to double, the EOQ would rise.
B) If annual demand were to double, the EOQ would increase.
C) If the carrying cost were to increase, the EOQ would fall.
D) I
E) All of the above statements are true.
Which of the following statements about the basic EOQ model is FALSE?
A) If the setup cost were to decrease, the EOQ would fall.
B) If annual demand were to double, the number of orders per year would increase.
C) If the ordering cost were to increase, th
D) If annual demand were to double, the EOQ would also double.
A product whose EOQ is 40 units experiences a decrease in ordering cost from $90 per order to $10 per order. The revised EOQ is:
A) three times as large.
B) one-third as large.
C) nine times as large.
D) one-ninth as large.
E) cannot be determined
B) one-third as large.
A product whose EOQ is 400 units experiences a 50% increase in demand. The new EOQ is:
A) unchanged.
B) increased by less than 50%.
C) increased by 50%.
D) increased by more than 50%.
E) cannot be determined
B) increased by less than 50%.
) For a certain item, the cost-minimizing order quantity obtained with the basic EOQ model is 200 units, and the total annual inventory (carrying and setup) cost is $600. What is the inventory carrying cost per unit per year for this item?
A) $1.50
B) $2.
C) $3.00
A product has a demand of 4000 units per year. Ordering cost is $20, and holding cost is $4 per unit per year. The EOQ model is appropriate. The cost-minimizing solution for this product will cost ________ per year in total annual inventory (holding and s
B) $800
A product has a demand of 4000 units per year. Ordering cost is $20, and holding cost is $4 per unit per year. The cost-minimizing solution for this product is to order:
A) all 4000 units at one time.
B) 200 units per order.
C) every 20 days.
D) 10 times
B) 200 units per order.
Which of the following statements regarding the reorder point is TRUE?
A) The reorder point is that quantity that triggers an action to restock an item.
B) There is a reorder point even if lead time and demand during lead time are constant.
C) The reorder
E) All of the above are true.
An inventory decision rule states, "When the inventory level goes down to 14 gearboxes, 100 gearboxes will be ordered." Which of the following statements is TRUE?
A) One hundred is the reorder point, and 14 is the order quantity.
B) Fourteen is the reorde
B) Fourteen is the reorder point, and 100 is the order quantity.
Which of the following statements regarding the production order quantity model is TRUE?
A) It applies only to items produced in the firm's own production departments.
B) It relaxes the assumption that all the order quantity is received at one time.
C) It
B) It relaxes the assumption that all the order quantity is received at one time.
Which of these statements about the production order quantity model is FALSE?
A) The production order quantity model is appropriate when the assumptions of the basic EOQ model are met, except that receipt is noninstantaneous.
B) Because receipt is noninst
D) All else equal, the smaller the ratio of demand rate to production rate, the larger is the production order quantity.
The assumptions of the production order quantity model are met in a situation where annual demand is 3650 units, setup cost is $50, holding cost is $12 per unit per year, the daily demand rate is 10 and the daily production rate is 100. What is the produc
C) 184
) A production order quantity problem has a daily demand rate = 10 and a daily production rate = 50. The production order quantity for this problem is approximately 612 units. What is the average inventory for this problem?
A) 61
B) 245
C) 300
D) 306
E) 4
B) 245
When quantity discounts are allowed, the cost-minimizing order quantity:
A) is always an EOQ quantity.
B) minimizes the sum of holding and ordering costs.
C) minimizes the unit purchase price.
D) may be a quantity below that at which one qualifies for tha
E) minimizes the sum of holding, ordering, and product costs.
) Which of the following statements about quantity discounts is FALSE?
A) The cost-minimizing solution may or may not be where annual holding costs equal annual ordering costs.
B) In inventory management, item cost becomes relevant to order quantity decis
D) The larger the annual demand, the less attractive a discount schedule will be.
Service level is the complement of the probability of a stockout.
Answer: TRUE
Safety stock in inventory systems depends only on the average demand during the lead time.
Answer: FALSE
If the standard deviation of demand is six per week, demand is 50 per week, and the desired service level is 95%, approximately what is the statistical safety stock?
A) 8 units
B) 10 units
C) 16 units
D) 64 units
E) Cannot be determined without lead time
E) Cannot be determined without lead time data.
A specific product has demand during lead time of 100 units, with a standard deviation during lead time of 25 units. What safety stock (approximately) provides a 95% service level?
A) 41
B) 55
C) 133
D) 140
E) 165
A) 41
Demand for dishwasher water pumps is 8 per day. The standard deviation of demand is 3 per day, and the order lead time is four days. The service level is 95%. What should the reorder point be?
A) about 18
B) about 24
C) about 32
D) about 38
E) more than 4
E) more than 40
The purpose of safety stock is to:
A) replace failed units with good ones.
B) eliminate the possibility of a stockout.
C) eliminate the likelihood of a stockout due to erroneous inventory tally.
D) control the likelihood of a stockout due to variable dema
D) control the likelihood of a stockout due to variable demand and/or lead time.
The proper quantity of safety stock is typically determined by:
A) using a single-period model.
B) carrying sufficient safety stock so as to eliminate all stockouts.
C) multiplying the EOQ by the desired service level.
D) setting the level of safety stock
D) setting the level of safety stock so that a given stockout risk is not exceeded.
If demand is not uniform and constant, then stockout risks can be controlled by:
A) increasing the EOQ.
B) spreading annual demand over more frequent, but smaller, orders.
C) raising the selling price to reduce demand.
D) adding safety stock.
E) reducing
D) adding safety stock.
If daily demand is normally distributed with a mean of 15 and standard deviation of 5, and lead time is constant at 4 days, a 90 percent service level will require how much safety stock?
A) 7 units
B) 10 units
C) 13 units
D) 16 units
E) 26 units
C) 13 units
) If daily demand is constant at 10 units per day, and lead time averages 12 days with a standard deviation of 3 days, 95 percent service requires how much safety stock?
A) 28 units
B) 30 units
C) 49 units
D) 59 units
E) 114 units
C) 49 units
In a safety stock problem where both demand and lead time are variable, demand averages 150 units per day with a daily standard deviation of 16, and lead time averages 5 days with a standard deviation of 1 day. What is the standard deviation of demand dur
C) 154 units
Which of the following items is mostly likely managed using a single-period order model?
A) Christmas trees
B) canned food at the grocery store
C) automobiles at a dealership
D) metal for a manufacturing process
E) gas sold to a gas station
A) Christmas trees
The main trait of a single-period model is that:
A) inventory has limited value after a certain period of time.
B) it has the largest EOQ sizes.
C) the order quantity should usually equal the expected value of demand.
D) supply is limited.
E) the cost of
B) it has the largest EOQ sizes.
A local club is selling Christmas trees and deciding how many to stock for the month of December. If demand is normally distributed with a mean of 100 and standard deviation of 20, trees have no salvage value at the end of the month, trees cost $20, and t
A) .60
Suppose that papers for a newspaper stand cost $0.40 and sell for $0.80. They currently have no salvage value. If the stand owner is able to find an outlet that would provide a salvage value of $0.10, what would be the increase in service level?
A) .5
B)
C) .07
Service level is:
A) the probability of stocking out.
B) the probability of not stocking out.
C) something that should be minimized in retail.
D) calculated as the cost of a shortage divided by (the cost of shortage + the cost of overage) for single-perio
E) B and D
A bakery wants to determine how many trays of doughnuts it should prepare each day. Demand is normal with a mean of 5 trays and standard deviation of 1 tray. If the owner wants a service level of at least 95%, how many trays should he prepare (rounded to
D) 7
The fixed-period inventory model can have a stockout during the review period as well as during the lead time, which is why fixed-period systems require more safety stock than fixed-quantity systems.
Answer: TRUE
The fixed-period inventory system requires more safety stock than a fixed-quantity system because:
A) a stockout can occur during the review period as well as during the lead time.
B) this model is used for products that have large standard deviations of
A) a stockout can occur during the review period as well as during the lead time.
A disadvantage of the fixed-period inventory system is that:
A) it involves higher ordering costs than the fixed quantity inventory system.
B) additional inventory records are required.
C) the average inventory level is decreased.
D) since there is no cou
D) since there is no count of inventory during the review period, a stockout is possible.
What is the difference between P and Q inventory systems?
A) order size
B) order spacing
C) maximum service level
D) lead time length
E) A and B
E) A and B
Which of the following is a requirement of Q systems?
A) perpetual inventory system
B) constant order spacing
C) variable lead time
D) constant demand
E) all of the above
A) perpetual inventory system
Q is to ________ systems as P is to ________ systems.
A) fixed quantity, fixed period
B) variable demand, constant demand
C) variable lead time, variable demand
D) variable quantity, variable period
E) quality, price
A) fixed quantity, fixed period
Which of the following should be higher in P systems than Q systems?
A) lead time
B) demand
C) order size
D) order spacing
E) safety stock
E) safety stock
An advantage of the fixed-period inventory system is that:
A) safety stock will be lower than it would be under a fixed-quantity inventory system.
B) there is no physical count of inventory items when an item is withdrawn.
C) no inventory records are requ
B) there is no physical count of inventory items when an item is withdrawn.
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