A.Sanchez_Part1_Planning and Scheduling Construction Projects_The Planning Process
Construction Scheduling Seminar
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Transcript of Construction Scheduling Seminar
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ConstructionSchedulingSeminarOctober18,2014
RAAConsultingEngineerandAssociates
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PreliminaryWorkshop Whatisconstruction? WhatisaProject? WhatisthePERT/CPM? WhySCurve?
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Constructionisacomplicatedandtimeconsumingundertaking putting together different materialsthrutheuseofpeopleandequipmenttocomeupwithafinishPROJECT
Formation Assembly Creation Erection Structure
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WhatisProject Undertaking Endeavor Development Mission Venture JobThathasabeginningandend.AProjectisaproblemscheduledforsolutionJamesP.Lewis
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Projectis Agroupofactivities,involvingTIME,COST,andRESOURCE,thatinteracttoachieveaspecificgoal.
Aplanned&temporaryundertakingdesignedfromanideaorconceptutilizingandcontrollingalimitedresourcesthruwhichaspecificanduniqueobjectiveisproduced. Temporarybeginningandend Uniquesomethingnotdonebefore
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PERT Program Evaluation and Review TechniqueCPM CriticalPathMethod
The program (or project) evaluation and reviewtechnique, commonly abbreviated as PERT, is astatisticaltool,usedinprojectmanagement,whichwasdesignedtoanalyzeandrepresentthetasksinvolvedincompletingagivenproject.
FirstdevelopedbytheUnitedStatesNavyinthe1950s,it is commonly used in conjunction with the CriticalPathMethod(CPM)
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BasictechniqueinpreparationofPERT/CPM
1. A list of all activities required to complete the project (typically categorized within a work breakdown structure),2. Thetime(duration)thateachactivitywilltaketo complete,3. Thedependenciesbetweentheactivitiesand,4. Logical end points such as milestones ordeliverable items.
TheessentialtechniqueforusingCPMistoconstructamodeloftheprojectthatincludesthe following:
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ThreePhaseofPERT
Scheduling
Planning
ControlMonitor
Determinetherelationshipbetweentheworkoperationandthesequenceinwhichtheyaretoperformed.Schedulingofworktimetoeachworkoperation,whentostartandwhentofinish
Translatingtheplannedscheduleintoarrowdiagramandintotimetableofcalendar
Updatingrecomputationbroughtbychangingconditions.
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NetworkDiagram Thenetworkdescribessequentialrelationshipamongdifferentactivitiesonaproject.
Example,activityCDcannotbestartedaccordingtothenetworkuntilactivityABhasbeencompleted.
CcannotstartuntilbothA&Barecompleted
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NetworkDiagram
AmustbecompletedbeforeeitherBorC
BothA&CmustbecompletedbeforeeitherBorD
NodetoNodeiscalledevent
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NetworkDiagram
A&BmustbecompletedbeforeCcanstart.DdependsonlyonB&A
NetworkDiagram:istoolindeterminingtheCriticalPathorthecriticaldurationoftheprojectcalledCPM.
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SampleestimationofTaskduration
Excavationworksnaturalsoil,Vol=120cu.m. Equipmentcapability:120cu.m./hr. DTcapacity=8.0cu.m. HaulingDistance=30km Ave.Haulingspeed=30kph LoadingTime=15mins. Unloadingtime=15mins.
Haulingtime=30/30=1hrLoadingtime=15/60=0.25hrUnloadingtime=15/60=0.25hrReturntrip=30/60=0.5hrTotalCycletime=2.0hrs
No.oftripperday=8hrs/2hrs=4
Vol.perday=32cu.m./day
Taskduration=120/32=3.75daysSay4days
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SampleTask Duration
(wk)a Mobilization 1b Exavation 2c Backfilling 2d Compaction 1e HaulingofSurplusexcavation 2f Fabricationofformsandinstallation 8g Rebarfabricationandinstallation 7h Concretepouring 4i Precastwallscasting 8j Precastwallsinstallation 7k Tilingworks 12l Ceilinginstallation 8m Electricalroughingin 2n Wiresandcables 4o EletricalFixturesanddevice 3p Plumbingroughingin 2q Plumbingfixtures 3
TaskDescription
Pleasecontinuethenetwork..eachgroup
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CriticalPath:a,b,f,I,k,wq=32weeks
Networkdiagram
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Project :Location :Subject : Construction Schedule and S-Curve (CATCH-UP SCHEDULE)
Item No. %Wt 26-27 28-29 30-31 2-7 9-14 16-21 23-28 30 1-5 7-12 14-19 21-26 28-31 1-2 3 4 5 6I General Requirements/Prelimenaries
a Mob./Demob. 0.62% 0.62b Tempfacil 1.85% 1.85c Temporary Enclosure 0.21% 0.21d Water and Powere Bonds and Permits (jobsite requirements only) 1.03% 1.03
II Earth Works (Sump pit, Baffle, Aerator, Settling and Effluent Tank) a Clearing and Grubbing 0.62% 0.62b Bulk Excavation 11.66% 11.66c Backfilling and Compaction 2.29% 2.29d Disposal of Surplus Excvation 3.66% 0.366 0.366 0.366 0.366 0.366 0.366 0.366 0.366 0.366 0.366e Influent and Effluent structure 0.56% 0.56
III Civil/Structural Works ((Sump pit, Baffle, Aerator, Settling and Effluent Tank) a Wall Footings 6.59% 3.3 2.29 1b Bottom Slab 5.70% 1.5 2.1 2.1c RC Walls (Precast and Cast in Place) 31.40% 7.85 8.4 2 8.4 4.75d Top Slab 1.19% 0.6 0.59e Inlet/Efluent 2.28% 1.145 1.135f Outlet/Effluent 2.62% 1.31 1.31g Causeway/Catwalk 1.24% 1.24
IV Plumbing Works 1.93% 0.65 0.64 0.64V Electromechanicals
a Installation of Pump (3hp) 3.66% 1.83 1.83b Installation of Blower (5hp) 7.20% 2.6 3.6 1c Aerator Disk 3.33% 1.665 1.665d Circuit Breaker 0.33% 0.33e Wires and Cables 0.51% 0.17 0.17 0.17f Conduit PVC Pipes 0.321% 0.107 0.107 0.107g Electrical Boxes 0.19% 0.095 0.095h Service Entrance Termination 0.62% 0.62i Consumables 1.41% 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.11 0.09
VII Site Improvementa CHB Fencing (see plan) 3.04% 0.76 0.76 0.76 0.76b Equipment Housing (see plan) 2.72% 1.36 1.36c Fabrication and Installation of Gate 0.99% 0.232 0.198 0.19 0.19 0.18d Consumables 0.22% 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.022 0.01
Total 100.00%Estimated Physical Accomplishment:
Weekly Physical Accomplishment 16.356 0.366 0.366 0.366 2.426 14.505 14.13 4.34 10.428 9.153 7.002 10.587 5.324 3.02 0.322 0.31 0.91 0.09Cumulative Physical Accomplishment 16.36 16.72 17.09 17.45 19.88 34.39 48.52 52.86 63.28 72.44 79.44 90.03 95.35 98.37 98.69 99.00 99.91 100.00
Actual Physical AccomplishmentWeekly Physical AccomplishmentCumulative Physical Accomplishment
Prepared by: Checked and Reviewed by: Approved by:
ENGR. RUEL AYAG DR. DANILO T. JAQUE GAUDIOSO LUARDO, JR. RAFAEL DE LARA SANVIVTORESProject Engineer Managing Director Project Director VP- CMTHydronet Consultant Inc. Hydronet Consultant Inc. Aboitizland Aboitizland
Description
Proposed Waste Water Treatment FacilityCanduman, Mandaue City
May 26 - 31, 2014 June 1- 30, 2014 July 1- 31, 2014 August 1 - 6, 2014
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CostVariance
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CostVariance
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ScheduleVariance
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ScheduleVariance
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SampleVerticalChartMEPFMEPF
9F
8F
7F
6F LEGEND: Roughingin
5F FittingandStubout
Fixtureinstallation4F
3F
2F
GF
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SampleVerticalChartStructuralSTRUCTURALWORKS
9F
8F
7F
6F LEGEND: FormsandScaffoldings
5F RebarInstallation
Concreting/ConcretePouring4F
3F
2F
GF
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SubstantialCompletionWhentheprojectis90%completed
Readyforownersuse.
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Thankyou
Amanwhograduatetodayandstoplearningtomorrowwillbecomeuneducatedmanthedayafter