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1、 By:Prof.Y.Peter Chiu Project Management HOMEWORK SOLUTION 1#3abCP=A B D F G 17 2#3=Where is not needed for solution,but it is the slack time.cABCDEFHG012 3 456 78 910 11 12 13 14 15 16 17 183#4A=3B=2E=6P2=0D=4C=5P1=0G=5F=1K=5H=3I=4P3=0J=40 31 43 87 12347800227 78 822887127128 128 1381291313 1617 14
2、21271713 1713 171617161717172121*4a A B C AD AE BF C，DG D，EH F，GI F，GJ H，I，K，LK BL bA-C-F-H-JA-C-F-I-JA-D-F-H-JA-D-F-I-JA-D-G-H-JA-D-G-I-JB-E-G-H-JB-E-G-I-J B-K-JL-J16171516192020211114*#45#4c Activities ti ESi SFi LSi LFi SlackABCDEFGHIJKL325461534451000332881313172032878913161721710107421281413171
3、27421288131317172117171041040100107CP=B-E-G-I-J6#5a ActivitiesImmediatePredecessorABCDEFGHIABDA，EDC，FC，F，G7#5bABP1DEGCFP2IH8#6abCP=A E G 78 C FG 78 9#6cd A,B,C,E,F 323077 785810#8A=3C=1P=0B=5D=4E=3F=3H=4G=20033338837488888881212891112121215151213161715151717A-B-P-D-F-G11#812=Where is not needed for
4、solution,but it is the slack time.#8ABCDEFHG012 3 456 78 910 11 12 13 14 15 16 17 1813#817 ABDFG3543223221$50 125 125 120 100ReduceA 32 costs$50G 21 costs$100Total$150*CP A-B-D-F-G A-B-D-Ha 14#815ABDFGH254314232212$125 125 120 150*If we consider“F then we must consider“H along with“F.ReduceB by 2D b
5、y 1*why?why not 2?refer to Gantt Chart a 15#8acost$125*2 B$125*1 for D Total$375CP A-B-D-F-G A-B-D-H A-B-E-F-G A-B-E-HTimeCPActivitiesCourent timeExpedited timecost12 ABDEFGH23333142322212$125 50 120 15016#8a One can consider D&E for$175/wk or F&H for$270/wk.return$150 per weak.bActivity Normal cost
6、ABCDEFGH#$200 600 100 650 450 500 500 60017#8bDirect cost$3600 for 17 days.For 12 days optimal project scheduleAddAGBD1121$50=50$100=100$125=250$125=125$525Direct cost$3600+$525=$4125 for 12 days.Indirect cost$150*12=$1800Total costs=$5925.vs.$6150#18#10a 19#10bActivitiesABCDEFGAA，BCE，Fti ES EF LS L
7、F Slack3221304526282000032323058322130775858780110333230583232307858587801101000CP=A-P1-E-GC-F-G20#10：A-E-G:CP：C-F-G:CP：A-D21#10Time Act.Current Exp.-time cost/dy78 A-E-GC-F-GACEFG32302628202630202418$50 110 40 75Reduce G one day cost$75.CP：A-D*A-E-G C-F-G*22#10Time Act.Current Exp.-time cost/dy77 A
8、-DA-E-GC-F-GACDEFG323045262819263040202418$50 60 110 40 75*Reduce A&F by 4 day cost$90*4=$360.23#10Time Current Exp.-time cost Activities CP73A-DA-E-GC-F-GACDEFG283045262419263040202418$50$60$110$75DONE Original 78 days cost$3300+$100 78=$11,100New expedited project scheduce 73 days.Cost Direct cost
9、+75+360=$3735Indirect 73*$100=$7300Total：$11,035.24#18PrTI 25 15=10=?E TI=9.17 Var TI=4.69PrZ 0.383=0.50+0.1492=0.649 P.530 25#19aBy lnspection CP=A B E G H 25E=626#19bPr T 28 weeks|CP=ABEGH=？Pr T 32 weeks|CP=ABEGH=？27#19cA B E G H Length=26.5 2A-B-E-G-H=7.860=2.804 PrZ=0.535=0.7037=70.37 PrZ=1.962=
10、0.9751=97.51 PrT X weeks|CP=ABEGH=95=1.645 X=31.11 weeks Z#28#20a All PATHS A-C-E 14 A-D-E 10 B-D-E 12 B-F-G 15 A-F-G 13bB-F-G*c 29#20dA-C-E 14 2=4.7B-F-G 15 2=5.8e A-C-E 14,2=4.7A-D-E 10,2=3.3A-F-G 13,2=5.8B-F-G 15,2=5.8B-D-E 12,2=3.3PrT 20=.99721.000.9982.9811.000=0.976#30#20f(d)A-C-E(e)B-F-Gare I
11、ndependent d is likely to be the most accurate 31#21From#3CP=A B D F G 32#21ab A-B-D-F-G=17 2A-B-D-F-G=2.52 Ans b 33#21cPr T 20 weeks|CP=A B D F G=Pr Z=1.89 Pr T X week=85%=0.9706 Ans c dZ=1.037 X=18.65 weeks Ans d 34abCP=A B D F H 41 days#3035cIndirect costs=$200 per day 0 62225 2731391618#3036cCho
12、ose B,reduce 4 days,from 10 to 6When B+D=6+6=12 CP=ABDFH=37&ACFH=37Cost 66.67*4=$266.67Save$200*4=$800#3037cB C=192；D C=225；Choose F=$110$200 best reduce F by 2 days,from 9 to 7 CP=ABDFH=35 ACFH=35 ABEG=6+6+9+14=35 cost 110*2=$220 save$200*2=$400#3038cB C=192 200 by 2 day cost 192*2=384 save 200*2=4
13、00 Total costs=266.67+220+384=870.67 Savings=800+400+400=1600 Net savings=729.23#3039 A B D F H 41200+600+625+700+200+400+1000+1100+$200 41=$13025Original Direct$4825 Indirect$200*41 Original Costs$13,025#3040#30Expedited Costs Original$4825+Expedited Costs$267 4*B 220 2*F384 2*B+C$871+Indirect Costs$200*33=$6600$12,296=Net savings$729=Time saved 41-33=8 days 41 The End42演讲完毕，谢谢观看！