An electronics manufacturer makes remote control devices for interactive-cable-TV systems. The following assembly tasks must be performed on each device.

Draw the precedence diagram for this problem, then determine the following:

a. What is the sum of the task times? [ Select ] ["4.67", "5.34", "25.9", "4.05"] minutes

b. What cycle time will allow the production of 200 units over a ten-hour day? [ Select ] ["15", "1.78", "3.9", "3"] minutes

c. What is the theoretical number of workstations needed? [ Select ] ["3", "5", "1", "2"]

d. Balance this assembly line using the heuristic longest operation time, what is the actual number of stations? 2

e. What is the efficiency based on your answer to letter d? [ Select ] ["35.9%", "85.0%", "72.3%", "67.5%"]

f. How much idle time is in this process based on the longest operation time? [ Select ] ["3.67", "1.25", "1.55", "1.95"] minutes

Task Description Predecessor(s) Time (min.) Place circuit into circuit frame 0.50 B Solder circuit connections to central circuit control A 0.70 IC Place circuit assembly in device frame B 0.40 D Attach circuit assembly to device frame C 0.30 E Place and attach display to frame 0.30 F Place and attach keypad to frame 0.20 G Place and attach top body of device to frame E, F 0.35 H Place and attach battery holder to frame D 0.40 Place and attach bottom body of device to frame GH 0.60 J Test device 0.30 Task Description Predecessor(s) Time (min.) Place circuit into circuit frame 0.50 B Solder circuit connections to central circuit control A 0.70 IC Place circuit assembly in device frame B 0.40 D Attach circuit assembly to device frame C 0.30 E Place and attach display to frame 0.30 F Place and attach keypad to frame 0.20 G Place and attach top body of device to frame E, F 0.35 H Place and attach battery holder to frame D 0.40 Place and attach bottom body of device to frame GH 0.60 J Test device 0.30