甘特图流程图课件.ppt

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1、St Davids 2 Shopping CentreA Project Case Study“St Davids 2”Shopping Centre Question 1.Draw a project network diagram of this project.Determine the shortest time to complete the project.Identify the critical activities.Task IDTask DescriptionDuration(Months)Cost(Millions)PrecedenceAPlanning and Cons

2、ultation912-BService Diversions915ACHighways Enabling310BDAppoint Main Contractor34AECPO Inquiry312AFObtain Government Approval32EGConstruct John Lewis Store2436C,D,FHDemolition1280C,D,FIMain Scheme Construction30210HJRefurbishment of St Davids Centre3050C,D,FKLibrary Construction2170C,D,FLJohn Lewi

3、s Fit-out159GMMain Scheme Fit-out325INLibrary Fit-out1216KOResidential Homes1292HPPublic Realm328IQOpening34L,M,NProject Network Diagram Activities A,B,C,H,I,M and Q are critical.The project duration is 69 months.Question 2.Convert the project diagram in a Gantt Chart.Schedule the non-critical activ

4、ities as late as possible.Gantt ChartQuestion 3.Determine the most cost effective way to complete this project within 56 months given the following informationTask IDTask DescriptionNormal Duration(Months)Normal Cost(Millions)Crash Duration(Months)Crash Cost(Millions)APlanning and Consultation912-BS

5、ervice Diversions915621CHighways Enabling310215DAppoint Main Contractor34-ECPO Inquiry312-FObtain Government Approval32-GConstruct John Lewis Store24361260HDemolition12801094IMain Scheme Construction3021024270JRefurbishment of St Davids Centre30501868KLibrary Construction217014105LJohn Lewis Fit-out

6、159915MMain Scheme Fit-out325250NLibrary Fit-out1216622OResidential Homes12926122PPublic Realm328235QOpening34-Crash cost Normal costCost to crash by one period=Normal timeCrash timeTask IDNormal Duration(Months)Normal Cost(Millions)Crash Duration(Months)Crash Cost(Millions)Crash to cost by one mont

7、hA912-B9156212C3102155D34-E312-F92-G243612602H128010947I302102427010J305018681.5K2170141055L1599151M32525025N12166221O129261225P3282357Q34-Step 1.St Davids in 68 months Activities A,B,C,H,I,M and Q are critical.The project duration is 68 months.Crash activity B one period to 8 periods for a cost of

8、2M.Step 2.St Davids in 67 months Activities A,B,C,H,I,M and Q are critical.The project duration is 67 months.The accumulated project crash cost is now 4M.Crash activity B one period to 7 periods for a cost of 2M.Step 3.St Davids in 66 months Activities A,B,C,H,I,M and Q are critical.The project dura

9、tion is 66 months.The accumulated project crash cost is now 6M.Crash activity B one period to 6 periods for a cost of 2M.Step 4.St Davids in 65 months Activities A,B,C,H,I,M and Q are critical.The project duration is 65 months.The accumulated project crash cost is now 11M.Crash activity C one period

10、 to 2 periods for a cost of 5M.Step 5.St Davids in 64 months Activities A,B,C,H,I,M and Q are critical.The project duration is 64 months.The accumulated project crash cost is now 18M.Crash activity H one period to 11 periods for a cost of 7M.Step 6.St Davids in 63 months Activities A,B,C,H,I,M and Q

11、 are critical.The project duration is 63 months.Activity H was crashed one period to 10 periods for a cost of 7M.The accumulated project crash cost is now 25M.Crash activity H one period to 10 periods for a cost of 7M.Step 7.St Davids in 62 months Activities A,B,C,H,I,M and Q are critical.The projec

12、t duration is 62 months.The accumulated project crash cost is now 35M.Crash activity I one period to 29 periods for a cost of 10M.Step 8.St Davids in 61 months Activities A,B,C,H,I,M and Q are critical.The project duration is 61 months.The accumulated project crash cost is now 45M.Crash activity I o

13、ne period to 28 periods for a cost of 10M.Step 9.St Davids in 60 months Activities A,B,C,H,I,M and Q are critical.The project duration is 60 months.The accumulated project crash cost is now 55M.Crash activity I one period to 27 periods for a cost of 10M.Step 10.St Davids in 59 months Activities A,B,

14、C,H,I,M,Q,G and L are critical.The project duration is 59 months.The accumulated project crash cost is now 65M.Crash activity I one period to 26 periods for a cost of 10M.Step 11.St Davids in 58 months Activities A,B,C,H,I,M,Q,G and L are critical.The project duration is 58 months.The accumulated pr

15、oject crash cost is now 76M.Crash activity I one period to 25 periods for a cost of 10M and crash L one period for a cost of 1M.Step 12.St Davids in 57 months Activities A,B,C,H,I,M,Q,G and L are critical.The project duration is 57 months.The accumulated project crash cost is now 87M.Crash Activity

16、I one period to 26 periods for a cost of 10M and crash L one period for a cost of 1M.Step 13.St Davids in 56 months Activities A,B,C,H,I,M,Q,G and L are critical.The project duration is 56 months.The accumulated project crash cost is now 113M.Crash activity M one period to 2 periods for a cost of 25M and crash L one period for a cost of 1M.The crash cost project duration trade-off

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