CrayComputerCorporationisdevelopinganewsupercomputer.Thetablebelowliststhe projectactivities,normal andcrashtimes,andnormalandcrashcosts.

		Immediate	Time(weeks)	Cost($1,000s)
Activity	Description	Predecessor(s)	Normal	Crash	Normal	Crash
A	Design		3	3	200	200
B	Evaluateequipment	A	6	4	80	100
C	Writemethodsreport	A	5	3	50	80
D	Buildprototype	A	7	4	125	170
E	Writeequipmentreport	C	2	1	20	30
F	Testprototype	B, D	3	2	140	160
G	Writefinalreport	E,F	3	2	45	105

a. Drawanactivitynetworkdiagramforthisproject.Usingthenormalactivitytimes,determinetheearlystart, earlyfinish,latestart,andlatefinishtimesforeachactivity.Recordthesevaluesinthediagram.

b. Basedonthenormalactivitytimesandcosts:

(i) Howlongwillittaketocompletetheproject?

(ii) Whatisthetotalprojectcost?

(iii) Identifythecriticalpath(s).

c. Foreachofthefollowingitems,statewhatthenewprojectdurationwillbeandbrieflyindicatewhy.Treateach oneindependently.

(i) An engineer informs you that it will take 8 weeks instead of 6 weeks to complete activity B(evaluate equipment).

New duration: Critical path(s):

Reason/Justification:

(ii) You learn that activity C(write methods report) will take 9 weeks instead of 5 weeks.

New duration: Critical path(s):

Reason/Justification:

(iii)You discover that activity E(write equipment report) will take 4 weeks instead of 2 weeks.

New duration: Critical path(s):

Reason/Justification:

d. Developacrashingscheduletoreducetheprojectdurationbyfour(4)weeks.Whatadditionalcostisrequired? (Ignoretheinformationinpartcwhenansweringthisquestion.)