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INVENTARIO

  1. Full Court Press, Inc. buys slick paper in 1500 pound rolls for textbook printing. Annual demand is 1920rolls. The cost per roll is $1000, and the annual holding cost is 30 percent of the cost. Each order costs $500.
  2. How many rolls should Full Court Press order at a time?
  3. What is the time between orders?
  1. SOCKS, Inc. buys 200 blank cassette tapes per monthfor use in producing foreign language courseware.The ordering cost is $50. Holding cost is $0.24 per cassette per year.
  2. How many rolls should SOCKS order at a time?
  3. What is the time between orders?
  1. Officer Krumpke buys doughnuts for the police department coffee break room. The department consumes 4 dozen doughnuts per day, 7 days per week. She buys doughnuts from the nearby Dandy Doughnut shop for $3.00 per dozen. Dandy offers free delivery. Officer Krumpke's time involved in placing a telephone order for replenishment is valued at $1.75. Because of high risks of obsolescence and pilferage, the cost to carry 1 dozen doughnuts in inventory for 1 week is $0.20. How many dozen doughnuts should Officer Krumpke order at a time?
  1. Louis Zephyr is a buyer for the Purgatory, Colorado. School District. Lou's duties include purchasing devil's food cake mix for the school system's cafeterias. The supplying firm, B. Elsie Bubba Company, specially makes each shipment of cake mix according to a tempting recipe specified by Purgatory schools. Production scheduling, several layers of bureaucracy, and remote locations result in high ordering costs and long lead times. Purgatory uses a continuous review inventory system.

Demand is normally distributed, with an average of 225 boxes of devil's food cake mix per month and a standard deviation of monthly demand of 35.36 boxes. Ordering costs are $123.21, and the lead time is 2 months. To hold a box of devil's food cake mix in inventory for a year costs $1.50. The desired cycle-service level is 90 percent.

  1. How many boxes of devil's food cake mix shouldLou Zephyr buy at a time?
  2. What is the reorder point?
  3. Suppose that 100 boxes are in on-hand inventoryand Lou has placed an order with B. Elsie Bubbafor the quantity indicated in part a, which hasn'tyet been delivered. However, cafeterias just haverequested a total of 112 boxes. According to thecontinuous review system, what should Lou do?
  1. An ophthalmologist's office operates 52 weeks per year, 6 days per week and uses a continuous review inventory system. It purchases disposable contact lenses for $11.70 per pair. The following information is available about these lenses.

Demand = 90 pairs/week

Order cost = $54/order

Annual holding cost = 27% of cost

Desired cycle-service level = 80%

Lead time = 3 weeks (18 working days)

Standard deviation of weekly demand =15 pairs

Current on-hand inventory is 320 pairs, with no open orders or backorders.

a.What is the EOQ? What would be the average time between orders (in weeks)?

b.What should ROP be?

c.An inventory withdrawal of 10 pairs was just made. Is it time to reorder?

d.The store currently uses a lot size of 500 units (i.e., Q = 500). What is the annual holding cost of this policy? annual ordering cost? Without calculating
the EOQ, how can you conclude from these two calculations that the current lot size is too large?

e.What would be the annual cost saved by shifting from the 500-unit lot size to the EOQ?

PLAN AGREGADO

PLAN DE PERSONAL

The Flying Frisbee Company has forecasted the following staffing requirements for fulltime employees. Demand is seasonal, and management wants three alternative staffing plans to be developed.

Month / 1 / 2 / 3 / 4 / 5 / 6 / 7 / 8 / 9 / 10 / 11 / 12
Requirement / 2 / 2 / 4 / 6 / 18 / 20 / 12 / 18 / 7 / 3 / 2 / 1

The company currently has 10 employees. No more than 10 new hires can be accommodated in any month because of limited training facilities. No backorders are allowed, and overtime cannot exceed 25 percent of regular-time capacity in any month. There is no cost for unused overtime capacity. Regular time wages are $1500 per month, and overtime wages are 150 percent of regular-time wages. Undertime is paid at the same rate as regular time. The hiring cost is $2500 per person, and the layoff cost is $2000 per person.

a.Prepare a staffing plan utilizing a level strategy.

b.Using a chase strategy, prepare a plan that is consistent with the constraint on hiring and minimizesuse of overtime.

c.Which strategy is most cost effective? What are theadvantages and disadvantages of each plan?

PLAN AGREGADO PARA MANUFACTURA O PLAN DE PRODUCCIÓN

Ejercicios 13.1 y 13.2 del libro de texto.

PARA LOS SIETE PUNTOSS DE BONO DEBERÁ HACER Y ENTREGAR:

  1. TRES EJERCICIOS DE INVENTARIO
  2. EL EJERCICIO DE PLAN DE PERSONAL
  3. UN EJERCICIO DE PLAN DE PRODUCCIÓN
  4. EJERCICIOS 3 Y 4 DEL DOCUMENTO DE MPS.