An assembly line is to operate eight hours per day with a desired output of 240 units per day. The following table contains information on this product’s task times and precedence relationships. Task Task Time (Seconds) Immediate Predecessor
A 60 ---
B 80 A
C 20 A
D 50 A
E 90 B, C
F 30 C, D
G 30 E, F
H 60 G
a. Draw the precedence diagram. (Answers in Appendix D)
b. What is the workstation cycle time required to produce 240 units per day?
c. Balance this line using the longest task time.
d. What is the efficiency of your line balance, assuming it is running at the cycle time from part (b)?

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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.)

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