14_USTB OM Homework Assignments北京科技大学运营管理作业答案

USTBOperations ManagementHomework AssignmentsByDr. Zhu，xiaoningStudent Name: 黄诗蕴 Take-Home Problem Solving and Essay QuestionsProblem #1-Decision Science (Module 10 Decision Analysis used)ABC is planning to publish 2CD titles: Discos in 70s and Romantic 60s. It is expected that payoff from 70s will be $100K if demand is low and $600K if demand is high. It is also expected that payoff from 60s will be $200K if demand is low and $400K if demand is high.a) Which title should ABC goes first based on Maximin（中间）, Maximax（第一个）, Minimax Regret and Laplace（最后）?b) Give your final recommendation.(a)Maximin如下图分析：保守型方案，认为两种CD需求都low，但是推荐价格高的商品（60s的CD）Maximax如下图分析：乐观方案，认为两种商品需求都高。并且推荐价格更高的商品（60s的CD）。Minimax regret and laplace如下图分析：悲观的方案，认为两种CD需求都小，使用Minimax，得出解决方案为70s定价为$100K,60s定价为$200K。并且推荐价格低的商品（70s）（b）综合分析Maxmin策划的分析：保守型方案，认为两种CD需求都low，因此得出解决方案为70s定价为$100K,60s定价为$200K。但是推荐价格高的商品（60s的CD）。Maximax分析：乐观方案，认为两种商品需求都高。因此得出解决方案为70s定价为$600K,60s定价为$400K,并且推荐价格更高的商品（70s的CD）。Minmax策划的分析：悲观的方案，认为两种CD需求都小。得出解决方案为70s定价为$100K,60s定价为$200K。并且推荐价格低的商品（70s）Problem #2-Waiting Line Model (Module 9 Waiting Lines used)Assuming 25 customers are arriving as the Poisson probability distribution within one hour and the service rate is two minutes per customer as exponential probability distribution in a one-line facility. Assuming the waiting cost per time period for each unit is $20 and the service cost per time period for each channel $18.a) For economic cost analysis, how many channels should company set?b) Give your reasons.（a）实验得，当channel为3，总费用为$71.11实验得，当channel为4，总费用为$88.72实验得，当channel为2，总费用为$56.17实验得，当channel为1，总费用为$118综上所述，在channel为2时，费用最低，为$56.17，之后随着channel数量增大，费用变高。Problem #3-Transportation Problem (Module 2 Transportation used)Arizona Plumbing which makes, among other products, a full line of bathtubs. To be successful, the firm must decide which of its factories should supply which of its warehouses. Relevant data for Arizona Plumbing are presented in the following table shows, for example, that it costs Arizona Plumbing 5$ to ship one bathtub from its Des Moines factory to its Albuquerque warehouse, $4 to Boston, and 3$ to Cleveland. Likewise, we see in the figure that the 300 units required by Arizona Plumbings Albuquerque warehouse might be shipped in various combinations from its Des Moines, Evansville, and Fort Lauderdale factories. ToFromAlbuquerqueBostonClevelandDes MoinesEvansvilleFort Lauderdale$5$8$9$4$4$7$3$3$5 demand 300 200 200a) Prepare a simple table for shipping routes from origins to destinations.b) Find the minimal total shipping cost.（a）(b)最小费用为$3900Problem #4-Invenroty Management (Module 8 Inventory used)Green Tea AAA Inc. has a near constant demands on propane of 3000 liters per month with unit price of $1.00; the firms cost of capital is 10% and other annual holding cost is 5%; the ordering cost is $10 flat each time. The firm is operating 360 days year and it takes 4 working days for propane delivery.a) How much to order each time?b) When to order (while inventory is fallen to what level)?（a）Order point is 400, number of order is2190.89, price of order is $2190.89.存货达到400开始订货，一年花费$328.32Problem #5-Invenroty Management with Quantity Discount (Module 8 Inventory used)Johnson Clothing Inc. has the related inventory data shown below: Its annual demand is 2000 units with the annual inventory holding cost of 20% and the ordering cost of $20 per order. The firm is operating 250 days per year and it takes 5 working days for propane delivery. Order size Discount Unit cost 0 - 99 0% $ 10.00100 - 299 1% $ 9.90300 - 999 2%