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 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 Place and attach bottom body of device to frame G H 0.60 Test device 0.30 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 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 Place and attach bottom body of device to frame G H 0.60 Test device 0.30