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| 资料名称： 项目管理之路3(doc121)英文版! - Rar格式 |
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| 项目管理之路311.AdvancedSchedulingTechniques11.1UseofAdvancedSchedulingTechniquesConstructionprojectschedulingisatopicthathasreceivedextensiveresearchoveranumberofdecades.Thepreviouschapterdescribedthefundamentalschedulingtechniqueswidelyusedandsupportedbynumerouscommercialschedulingsystems.Avarietyofspecialtechniqueshavealsobeendevelopedtoaddressspecificcircumstancesorproblems.Withtheavailabilityofmorepowerfulcomputersandsoftware,theuseofadvancedschedulingtechniquesisbecomingeasierandofgreaterrelevancetopractice.Inthischapter,wesurveysomeofthetechniquesthatcanbeemployedinthisregard.Thesetechniquesaddresssomeimportantpracticalproblems,suchas:·schedulinginthefaceofuncertainestimatesonactivitydurations,·integratedplanningofschedulingandresourceallocation,·schedulinginunstructuredorpoorlyformulatedcircumstances.Afinalsectioninthechapterdescribessomepossibleimprovementsintheprojectschedulingprocess.InChapter14,weconsiderissuesofcomputerbasedimplementationofschedulingprocedures,particularlyinthecontextofintegratingschedulingwithotherprojectmanagementprocedures.Backtotop11.2SchedulingwithUncertainDurationsSection10.3describedtheapplicationofcriticalpathschedulingforthesituationinwhichactivitydurationsarefixedandknown.Unfortunately,activitydurationsareestimatesoftheactualtimerequired,andthereisliabletobeasignificantamountofuncertaintyassociatedwiththeactualdurations.Duringthepreliminaryplanningstagesforaproject,theuncertaintyinactivitydurationsisparticularlylargesincethescopeandobstaclestotheprojectarestillundefined.Activitiesthatareoutsideofthecontroloftheownerarelikelytobemoreuncertain.Forexample,thetimerequiredtogainregulatoryapprovalforprojectsmayvarytremendously.Otherexternaleventssuchasadverseweather,trenchcollapses,orlaborstrikesmakedurationestimatesparticularlyuncertain....... |
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