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

Task	Description	Predecessor(s)	Time (min.)
A	Place circuit into circuit frame	--	0.50
B	Solder circuit connections to central circuit control	A	0.70
C	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
I	Place and attach bottom body of device to frame	G, H	0.60
J	Test device	I	0.30

a. What cycle time will allow the production of 200 units over a ten-hour day? [ Select ] ["2.8", "3", "3.5", "4"] min

b. What is the theoretical number of workstations needed? [ Select ] ["3", "4", "2", "1"]

c. Balance this assembly line using the heuristic longest operation time, what is the actual number of workstations ? [ Select ] ["4", "3", "5", "2"]

d. What is the idle time per cycle based on an improved cycle time? [ Select ] ["1.55", "1.90", "2.33", "1.75"]

e. What is the efficiency based on letter d? [ Select ] ["72.3%", "67.5%", "75.15%", "95.0%"] %