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business
operations management

Questions and Answers of Operations Management

Mirrors are sometimes placed in busy lobbies, waiting areas, and on elevator doors. Their purpose is often to make the time pass faster for people waiting in front of them. Which psychological
What is an example of a situation in which the cost of capacity is substantially more than the cost of waiting? What would the waiting line look like in that situation?
What is the body of knowledge concerning mathematical modeling of waiting lines called?
On what do the mathematical and the psychological modelers of waiting disagree?
You are observing a line of people at the ordering counter of a campus coffee house. This line has at least 15 people waiting to order. Suddenly you notice two people walk through the front door of
Think of a particular single-queue, single-server waiting line situation. Which of the M/M/1 model assumptions is least likely to fit that actual situation?
What does queue discipline determine?
Pegasus Veterinary Hospital (PVH) is a partnership of five veterinarian surgeons who specialize in treating horses. PVH is located in a $25 million facility on 20 acres of land, employing over 40
You are a recently appointed purchasing manager who is overseeing terms and con- ditions of contract for an important international purchase with a UN country. What rules should you be particularly
A tender evaluation method specifies 60% price and 40% quality. What is the weighted score of a tender that scored 80 points (out of 100) for price and 60 for quality?
A tender evaluation method specifies 30% price and 70% quality. What is the weighted score of a tender that scored 80 points (out of 100) for price and 60 for quality?
You are reviewing a tender evaluation that is to be awarded on lowest total price. The bid evaluations follow:To which company should the contract be awarded? Company Capital Cost Maintenance
You are analyzing bids from two companies. Company A has scored 85 points on the quality evaluation (out of a scale of 100 points), while company B has scored 95 points. The overall weighting your
You are listening to two employees from your organization's purchasing depart- ment. They are looking over long lists of items purchased by your organization and arguing about how to consolidate
Main Street Cinema is a single-screen movie theater in a residential area. Main Street Cinema is a licensed exhibitor of Mega Pictures Distribution Company, meaning that it receives all its movies
Main Street Cinema invited three firms to bid on its daily janitorial services contract, and then scored those tenders based on quality, reliability/risk, and price (using a 100-point scale in each
Southwestern Food Bank is a large nonprofit organization that secures government grant revenue and private donations to purchase and redistribute bulk quantities of food for shipment to community
You have invited four companies to bid on a consulting project. All four companies answered your invitation to tender, but the bids vary in the number of hours each company estimates will be required
Universal Logistics manages five warehouses, each of which serves several other companies on a contract basis. Universal charges each company an annual fixed fee for each SKU it handles on behalf of
Mathematically, when would the EOQ and the EPQ recommend nearly identical order sizes? How does this relate to the concepts of instantaneous and noninstanta- neous relationships?
If a reorder point is increased, what happens to its service level?
Student Transportation Now Inc. (STN) has a single supply depot that stocks and ships small maintenance items and replacement parts used by techni- cians that maintain STN's fleet of 45,000 school
Why would inventory holding costs be higher for a new business than for a similar business that has been operating for many years?
Denton Pet Clinic is a small business owned by two veternarians who employ two full-time staff members and a new part-time busi- ness manager. The business manager believes that Denton could save
If a reorder point is increased, what happens to its safety stock?
What type of business sells a tangible product and yet has no WIP inventory?
If a reorder point is decreased, what happens to its stock out risk?
If annual demand suddenly fell by half, would the EOQ likewise be reduced by half? Explain.
In a fixed order quantity policy, if the policy's order size is decreased, what happens to average inventory level?
If annual demand suddenly fell by half, would the ROP likewise be reduced by half? Explain.
In a fixed order quantity policy, if the policy's order size is decreased, what happens to the frequency of ordering?
Two items both have reorder points with service levels of 99%. One of the items is ordered 10 times a year, and the other item is ordered 20 times a year. Do these two items have the same overall
In a fixed order quantity policy, if the policy's order size is increased, what happens to the reorder point?
Assuming perfectly constant demand, if lead time increases from 5 to 10 days, what happens to the reorder point?
In an ABC classification scheme, which groups of items will be least tightly controlled?
The two basic issues in inventory are how much to order and what else?
A company that was using the EOQ formula to determine batch sizes realizes it has made a mistake and must recalculate those batch sizes using the EPQ formula. What will happen to batch sizes at this
What is SKU short for?
Is a transaction fee mostly likely an example of a fixed or a variable cost?
Lead time for some SKU is always 5 days, and demand for that SKU is always 50 per day. What is the reorder point for this SKU?
A gift shop sells 400 boxes of scented candles a year. The ordering cost is \($60\) for scented candles, and holding cost is \($24\) per box per year. What is the economic order size for scented
A car rental agency uses 96 boxes of staples a year. The boxes cost \($4\) each. It costs \($10\) to order staples, and it costs \($0.80\) to hold a box of staples in inventory for 1 year. How many
A car rental agency uses 96 boxes of staples a year. The boxes cost \($4\) each. It costs \($10\) to order staples, and it costs \($0.80\) to hold a box of staples in inventory for 1 year. Using the
The reorder point for SKU 303 is 102 units, while average demand during the lead time on an order for SKU 303 is 97 units. How much safety stock is implied by SKU 303's reorder point policy?
A certain company reorders envelopes when its stock drops to 12 boxes, although demand for envelopes during lead time is normally distributed with a mean of 10 boxes and a standard deviation of 3
A carpet cleaning firm uses an average of 20 gallons of cleaning fluid a day. Usage tends to be normally distributed with a standard deviation of 2 gallons per day. Lead time is 4 days, and the
A gift shop sells 400 boxes of scented candles a year. The ordering cost is \($60\) for scented candles, and holding cost is \($24\) per box per year. What is the minimum annual amount of these
The Office of Environmental Studies uses a reorder point system to govern its order- ing of new shipments of public information flyers. Demand for public information flyers varies, depending on the
If demand for an item is 10 per month, the cost of placing an order is \($15\), and the cost of holding one item in inventory for 1 year is \($25\), what is the EOQ?
Suppose that annual demand for a certain item has decreased dramatically this year, although the store that stocks this item has not updated its inventory policy, so the store is still using the same
The demand for a particular part called SKU 005 is 1,500 units a year. The cost of one SKU 005 is \($50.00\). It costs \($60.00\) to place an order for SKU 005, and the user of SKU 005 has a per year
The Sun Up Convenience Store is open 365 days a year. Sun Up sells 25 bottles of Electric Energy Drink each day. It costs \($8.00\) for Sun Up to order Electric Energy Drink, regardless of the size
The Fine Crate Company uses 14,600 wooden slats a year, building wooden crates at a constant rate. The Fine Crate Company can produce 160 wooden slats a day when it sets up to produce wooden slats.
A large hotel serves banquets and several restaurants from a central kitchen in which labor is shifted among various stations and jobs. Dessert consumption is vir- tually constant and known to be
A warehouse stocks three different items: SKU 1, SKU 2, and SKU 3.Information on each of these items is provided in this table:The warehouse uses the same reorder point for all three items: it always
Consider the sawtooth diagram below, which illustrates the inventory issues asso- ciated with SKU 0012, a small, stamped metal part produced by the ConAm Com- pany, over the last 40 days. Answer the
What is more important, aggregate or material requirements planning?
Aggregate planning can also be thought of as what kind of capacity planning?
Link's Lumber manufactures pressure-treated wood materials that it aggregates into metric tons of output for medium-term capacity planning. Link's follows level production schedules calculated at
Material requirements planning was developed for manufacturing. How might this system be put to work for a service organization?
The process of translating an aggregated value into individual estimates correspond- ing to specific products is referred to as what?
Bedok Company builds a finished good A that consists of two child items, one B and one C. Lead time on each of these three items is 1 week, and 10 of each of the two child items are in inventory
Newer, smaller businesses are more often observed chasing demand than leveling production. Why would these businesses prefer that particular strategy?
Recall from Chapter 6 that Myer Wine Racking and Cel- lar Company is a small but growing carpentry job shop specializing in natural-finish redwood racking systems for storage and display of wine
What is an aggregate planning approach that relies on adjusting capacity to reflect current demand called?
What is an Achilles' heel and why would a certain assumption about lead times be considered the Achilles' heel of MRP?
Largely idle capacity maintained beyond the expected load level of a system, often to absorb unexpected demand, is described as what?
What type of inventory has a parent and at least one child item?
What type of inventory is childless?
Finished goods always appear on what level in a product structure diagram?
If a product structure diagram has five levels, what is the number of its lowest level?
When performing MRP calculations, the planned order releases of an item are incor- porated into the gross requirements of any child of that item, multiplied by what?
A scheduling approach that recognizes capacity constraints is described as what?
What is a strategic information system that integrates all functional areas of an orga- nization called?
Are level production strategies associated with lower or higher utilization of resources, compared to other approaches?
Consider the following product structure: Each A consists of one B and three Cs. Each B consists of one D, 2 Es, and 5 Fs. Each C consists of one E and one F. How many Es are necessary to produce a
Consider the following product structure: Each A consists of one B and three Cs. Each B consists of one D, two Es, and five Fs. Each C consists of one E and one F. How many Fs are necessary to
Maynard Associates has 62 units of a certain product on hand currently. The demand forecast for next week is 25 units, and Maynard plans to produce an additional 10 units of the product during that
Maynard Associates has 62 units of a certain product on hand currently. The demand forecast for next week is 25 units, and Maynard plans to produce an additional 10 units of the product during that
Brightlin has 50 steel wheels in stock and needs 332 to complete an upcoming proj- ect. If Brightlin creates its own steel wheels in batches of 25, how many steel wheels should it order from itself
If a shipment is needed in week 8 and the lead time on its arrival is always 3 weeks, when should the shipment be ordered?
If item Y is the parent of Z and item X is the parent of Y, which item is the finished good?
Given no starting inventory, cumulative production of 2,000 units at the end of a certain month by which cumulative demand is up to 2,500 units implies what?
Maynard Associates has 62 units of a certain product on hand currently. The demand forecast for the next two planning periods is 25 units each period. Maynard Associ- ates has no plans for production
Maynard Associates has 62 units of a certain product on hand currently. The demand forecast for the next two planning periods is 25 units each period. Maynard Associ- ates has no plans for production
Maynard Associates has 62 units of a certain product on hand currently. The demand forecast for the next two planning periods is 25 units each period. Maynard Associ- ates has no plans for production
A finished good A consists of two child items, one B and one C. Lead time on each of these three items is 1 week, and 10 of each of these three items are available in inventory currently, available
Customer demand for some finished good is forecast at 1,000 units for January, 2,000 units for February, and 3,000 units for March. If the company that produces this finished good has nothing in
The XYZ Firm has 56 units of SKU001 available in inventory right now. The forecast of demand for SKU001 is 20 units per week for the next 4 weeks. If XYZ Firm plans to produce 100 units of SKU001
Brightland Tech must develop an aggregate plan to meet the following 5 months of demand:Brightland has 50 units in inventory at this time, and the company intends to produce 150 units a month for the
A warehouse began the month of October with 300 tons of goods, but its inven- tory had fallen to 100 tons at the beginning of November, before increasing again to 200 tons at the beginning of
The manufacturing company Highlands Archery has forecast the demand for the Grizzly compound bow for the next 4 months. The production manager at High- lands Archery has already created an aggregate
Livingston Fabrication has created the following aggregate plan for the next 5 months:Assume that Livingston will have nothing in inventory at the end of July. Livingston employs 500 production
Dumfries Industries is generating a materials requirement plan for the next 6 weeks. Here is its most current information:a. How many levels does a product structure for Dumfries' item A have?b.
General Food Stuffs packages a variety of breakfast cereals and snack bars, which it aggregates as simply units of sale when doing medium-term planning. General Food Stuffs has created the following
Williston Technologies wishes to use MRP methodology to develop a plan for the next 9 weeks. Williston Technologies has gathered the following information:a. Using MRP methodology, how much of parts
Consider the following product structure diagram, representing a bill of materials required to assemble some finished good A:(Items A through FF have been sketched as circles for convenience, but
Visit a furniture store (other than IKEA) and a sandwich or snack shop (other than Prêt a Manger). Observe how each shop operates, for example where customers go, how staff interact with them, how
Step 1 – Look again at the figures in the chapter which illustrate the meaning of each performance objective for the four operations. Consider the bus company and the supermarket, and in particular
If the space restrictions are relaxed and the average work in process rises to ten what will the throughput time be?

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