A foundry produces cast-iron ingots. While preparing a three month aggregate plan, the operations manager uncovered the following information: The cost of producing a batch of ingots is $100 per regular shift hour, and $140 for overtime hours. Inventory carrying cost is $4 per batch per month. There are 50 batches of inventory left over from December. Month Regular Time Capacity (batches) OT Capacity (batches) Demand (batches)
Jan. 2,880 355 3,000
Feb. 2,780 315 2,750
March 2,760 305 2,950

Use the transportation method and assume that backlogs are not permitted. Subcontracting is not available.

Required:
a. What is the optimal cost?
b. How much unused regular time capacity is there?
c. How much unused overtime time capacity is there?
d. What is the optimal cost now?

Electronics assembly inc. is a contract manufacturer that assembles consumer electronics for a number of companies. currently, the operations manager is assessing the capacity requirements as input into a bid for a job to assemble cell phones for a major global company. the company would assemble three models of cell phones in the same assembly cell. setup time between the phones is negligible. electronics assembly inc. operates two 8-hour shifts for 275 days per year. cell phone demand forecast (phones/year) processing time (minutes/phone) mars 47,000 19.8 saturn 35,000 20.7 neptune 7,500 16.2 a. calculate total capacity required by line. b. determine the total operating time available. c. calculate the total number of assembly cells. (round up your answer to the next whole number.)

Four key marketing decision variables are price (p), advertising (a), transportation (t), and product quality (q). consumer demand (d) is influenced by these variables. the simplest model for describing demand in terms of these variables is: d = k – pp + aa + tt + qq where k, p, a, t, and q are constants. discuss the assumptions of this model. specifically, how does each variable affect demand? how do the variables influence each other? what limitations might this model have? how can it be improved?

Which firm is credited with creating "the perfect business apology"? ​?