The Rover 6 is a new custom-designed sports car. An analysis of the task of building the Rover 6 reveals the following list of relevant activities, their immediate predecessors, and their duration:2

Job letter	Description	Immediate Predecessor(S)	Normal Time (Days)
A	Start	-	0
B	Design	A	8
C	Order special accessories	B	0.1
D	Build frame	B	1
E	Build doors	B	1
F	Attach axles, wheels, gas tank	D	1
G	Build body shell	B	2
H	Build transmission and drivetrain	B	3
I	Fit doors to the body shell	G, E	1
J	Build engine	B	4
K	Bench-test engine	J	2
L	Assemble chassis	F, H, K	1
M	Road-test chassis	L	0.5
N	Paint body	I	2
O	Install wiring	N	1
P	Install interior	N	1.5
Q	Accept delivery of special accessories	C	5
R	Mount body and accessories on chassis	M, O, P, Q	1
S	Road test car	R	0.5
T	Attach exterior trim	S	1
U	Finish	T	0

1. Draw a network diagram for the project.
2. Mark the critical path and state its length.
3. If the Rover 6 had to be completed 2 days earlier, would it help to:
   1. Buy preassembled transmissions and drivetrains?
   2. Install robots to halve engine-building time?
   3. Speed delivery of special accessories by 3 days?

4.How might resources be borrowed from activities on the noncritical path to speed activities on the critical path? "