ConstructionSchedulingSeminarOctober18,2014

RAAConsultingEngineerandAssociates

PreliminaryWorkshop Whatisconstruction? WhatisaProject? WhatisthePERT/CPM? WhySCurve?

Constructionisacomplicatedandtimeconsumingundertaking putting together different materialsthrutheuseofpeopleandequipmenttocomeupwithafinishPROJECT

Formation Assembly Creation Erection Structure

WhatisProject Undertaking Endeavor Development Mission Venture JobThathasabeginningandend.AProjectisaproblemscheduledforsolutionJamesP.Lewis

Projectis Agroupofactivities,involvingTIME,COST,andRESOURCE,thatinteracttoachieveaspecificgoal.

Aplanned&temporaryundertakingdesignedfromanideaorconceptutilizingandcontrollingalimitedresourcesthruwhichaspecificanduniqueobjectiveisproduced. Temporarybeginningandend Uniquesomethingnotdonebefore

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)

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:

ThreePhaseofPERT

Scheduling

Planning

ControlMonitor

Determinetherelationshipbetweentheworkoperationandthesequenceinwhichtheyaretoperformed.Schedulingofworktimetoeachworkoperation,whentostartandwhentofinish

Translatingtheplannedscheduleintoarrowdiagramandintotimetableofcalendar

Updatingrecomputationbroughtbychangingconditions.

NetworkDiagram Thenetworkdescribessequentialrelationshipamongdifferentactivitiesonaproject.

Example,activityCDcannotbestartedaccordingtothenetworkuntilactivityABhasbeencompleted.

CcannotstartuntilbothA&Barecompleted

NetworkDiagram

AmustbecompletedbeforeeitherBorC

BothA&CmustbecompletedbeforeeitherBorD

NodetoNodeiscalledevent

NetworkDiagram

A&BmustbecompletedbeforeCcanstart.DdependsonlyonB&A

NetworkDiagram:istoolindeterminingtheCriticalPathorthecriticaldurationoftheprojectcalledCPM.

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

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

CriticalPath:a,b,f,I,k,wq=32weeks

Networkdiagram

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

CostVariance

CostVariance

ScheduleVariance

ScheduleVariance

SampleVerticalChartMEPFMEPF

9F

8F

7F

6F LEGEND: Roughingin

5F FittingandStubout

Fixtureinstallation4F

3F

2F

GF

SampleVerticalChartStructuralSTRUCTURALWORKS

9F

8F

7F

6F LEGEND: FormsandScaffoldings

5F RebarInstallation

Concreting/ConcretePouring4F

3F

2F

GF

SubstantialCompletionWhentheprojectis90%completed

Readyforownersuse.

Thankyou

Amanwhograduatetodayandstoplearningtomorrowwillbecomeuneducatedmanthedayafter