Computer Hardware Development, Inc. (better known as CHaD - also the President and CEOs name) is developing a new laptop computer for students.

Activity	ID	Immediate Predecessor	Time (Wks)
Design Laptop	A		21
Build Prototype	B	A	5
Evaluate Design	C	A	7
Test Prototype	D	B	2
Write Manual	E	C, D	5
Prep Production	F	C, D	8
Test Production	G	E, F	2

a) Draw the project network.

b) Determine the critical path(s).

ID	Time	ES	EF	LS	LF	TS	CP
A	21
B	5
C	7
D	2
E	5
F	8
G	2

c) From the following information, determine the cost to crash the project to the shortest possible duration.

Activity	ID	Immediate Predecessor	Time (Wks)	Min Time	Per Week Crash Cost
Design Laptop	A		21	18	$200
Build Prototype	B	A	5	3	$100
Evaluate Design	C	A	7	5	$250
Test Prototype	D	B	2	1	$300
Write Manual	E	C, D	5	5	NA
Prep Production	F	C, D	8	6	$150
Test Production	G	E, F	2	1	$300

				Crash	Cost	Total