**Week 6 The Dubuque Cement Company packs 80-pound bags of concrete mix Operation Management Answer**

**Week 6 The Dubuque Cement Company packs 80-pound bags of concrete mix Operation Management Answer**

Week 6 The Dubuque Cement Company packs 80-pound bags of concrete mix Operation Management Answer

Week 6 The Dubuque Cement Company packs 80-pound bags of concrete mix Operation Management Answer

10.29 The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company’s policy is a 23% allowance for workers.

a) Compute the standard time for the bag-packing task.

b) How many observations are necessary for 99% confidence, within 5% accuracy?12.1 L. Houts Plastics is a large manufacturer of injection-molded plastics in North Carolina. An investigation of the company’s manufacturing facility in Charlotte yields the information presented in the table below. How would the plant classify these items according to an ABC classification system?

12.9 Southeastern Bell stocks a certain switch connector at its central warehouse for supplying field service offices. The yearly demand for these connectors is 15,000 units. Southeastern estimates its annual holding cost for this item to be $ 25 per unit. The cost to place and process an order from the supplier is $75. The company operates 300 days per year, and the lead time to receive an order from the supplier is 2 working days.

a) Find the economic order quantity.

b) Find the annual holding costs.

c) Find the annual ordering costs.

d) What is the reorder point?12.17 Radovilsky Manufacturing Company, in Hayward, California, makes flashing lights for toys. The company operates its production facility 300 days per year. It has orders for about 12,000 flashing lights per year and has the capability of producing 100 per day. Setting up the light production costs $50. The cost of each light is $1. The holding cost is $0.10 per light per year.

a) What is the optimal size of the production run?

b) What is the average holding cost per year?

c) What is the average setup cost per year?

d) What is the total cost per year, including the cost of the lights?14.3 The demand for subassembly S is 100 units in week 7. Each unit of S requires 1 unit of T and 2 units of U. Each unit of T requires 1 unit of V, 2 units of W, and 1 unit of X. Finally, each unit of U requires 2 units of Y and 3 units of Z. One firm manufactures all items. It takes 2 weeks to make S, 1 week to make T, 2 weeks to make U, 2 weeks to make V, 3 weeks to make W, 1 week to make X, 2 weeks to make Y, and 1 week to make Z.

a) Construct a product structure. Identify all levels, parents, and components.

b) Prepare a time-phased product structure.14.4 Using the information in Problem 14.3, construct a gross material requirements plan.

14.5 Using the information in Problem 14.3, construct a net material requirements plan using the following on-hand inventory.

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