CHAPTER 10CONTROLLING PROJECT COSTTIMEAND QUALITYWord文档下载推荐.docx
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CHAPTER 10CONTROLLING PROJECT COSTTIMEAND QUALITYWord文档下载推荐.docx
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PROJECTCONTROLOBJECTIVES
Standards
Actuals
BASICCONTROLTHEORY
PREPARINGAPROJECTFORCONSTRUCTION
CostBaseline
TimeBaseline
BaselineSummary
MINIMUMCOSTSCHEDULING
Crashing
COSTANDSCHEDULEPERFORMANCEMODELS
IncomeProjection
PaymentProjection
CONTROLINACTION
CostEngineering
ProgressEvaluationandControl
CostandSchedulePerformance
ProjectDocumentation
CONCLUSION
STUDENTLEARNINGOBJECTIVES
Inthischapteryouwilllearnthefollowing:
1.Theobjectivesofaprojectcontrolsystem
2.Thebasicsofhowaprojectcontrolsystemworks
3.Theprocessofpreparingaprojectforconstructionandcontrol
4.Themodelsusedtomonitorandcontrolcashinflowsandoutflows
5.Howtoproperlymeasureanddocumentcostandscheduleperformance
INTRODUCTION
Projectcontrolbeginswiththeidentificationoftheowner'
sobjectivesandendswhenthoseobjectiveshavebeenmet.Theowner,thedesigner,andtheconstructionprofessionaltogetherdesign,estimate,andscheduletheprojecttomeettheseobjectives.Thisisthebasisofthecontrolsystem.Onlargeorcomplicatedprojects,thecontroleffortisamajorundertakingwithmultipleorganizationsinvolved.
Thepurposeofprojectcontrolistoguaranteethattheproject'
sdesign,budget,andschedulearemetbytheprojectteam.Ifanyobjectivebeginstoslip,thecontrolsystemwillidentifythisdeviationearlysothattheappropriatecorrectioncanbemade.
Projectcontrolbeginswithaplanthatidentifiestheobjectivesoftheprojectandspecificcheckpointsthroughouttheprojectcycle.Theplanisaroadmapthatallowstheprojectteamtoconstantlymonitorandmakecorrectionsasnecessary.Itconsistsofdesigndocumentsforqualitychecks,anestimatethatestablishesbudgetrequirements,andascheduleforprojectmilestonedates.
Projectcontrolisanaction-basedprocessthatencouragescontinualmonitoringofoperations.Tobesuccessful,theactualworkwithitscostanddurationmustbecompletelyandaccuratelydocumented.Comparisonsshoujdbemadetoprojectstandardsandvariancesnoted.Bycreatingsuchafeedbackloop,adjustmentscanbemadeforupcomingactivities.Inaddition,actualdurations,costs,andimportanteventsshouldberecordedforuseonfutureprojects.
Theprojectcontrolprocessincludesthefollowingsteps,whichactasafeedbackloop:
1.Thecontrolprocessdocumentsprogressandallowstheprojectteamtoadjusttounexpectedoccurrences,suchaschangeorders,strikes,orbadweather.
2.Costsandtimeofcompletionarecontinuallyupdated.
3.Areportingsystemnotifiesallnecessarypartiesoftheprojectstatus.Thisallowstheinputofoutsidetechnicalexpertsandseniormanagers,whocanassistandplanadjustmentsasnecessary.
4.Theprojectcontrolsystemisiterative:
theprocessoccursoverandover,encouragingcontinualadjustmentoftheprojectplan.
Standards
Asystemofcontrolisessentialforthesuccessfuldeliveryofanyconstructionproject.Tobegintheprocess,managersfirstestablishthestandardsthatdefinesuccessfortheconstructionproject.Cost,schedule,andqualityarethebasisofthesestandardsandareconfiguredsothattheyaremeasurableandcanprovidedirectiontotheproject.Theprojectteamwillcontinuallyusethesestandardstocheckprogressandprovidedirection.Justastransportaircraft,cargoships,andtruckersaretrackedatspecificcheckpointstomonitorprogress,constructionprojectsmustcontinuallyreportin.
Thestandardsusedforcontrolvarybyprojectdependingonthelevelofcontrolnecessary.Fast-pacedprojectswithmanypartiesandcontractualobligationsmustbemoretightlymonitoredthanasinglecontractor'
sexcavationproject,forinstance.Drawingsandspecificationsdefinethestandardsforqualitycontrol.Drawingsdefinethequantityofworkrequired,locations,andwidthsandheights.Specificationsprovideperformancestandardsthataddressalignment,compressionstrengths,finishes,andsoon.Theprojectestimateestablishestheoverallbudgetfortheprojectandcanbebrokendowntospecifymilestonecostsforeachcomponentofwork.Thescheduledefineswhenspecificworkitemsneedtobeaccomplishedaswellasprovideskeymilestoneanddeliverydates.Estimatingdatacanbeintegratedwithscheduleinformationtoprovideadditionalprojectstandards.
Measurementstandardsserveasthegoalsfortheprojectparticipants.Theyaretargetsand,ifwellthoughtout,canorganizeaverycomplicatedproject.Eachprojectparticipantcanbegivenataskwithacorrespondingbudgetandtimeframeinwhichtoaccomplishthejob.Forexample,acarpentercanbegiventhetaskofframingo
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