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1、28WorkedexamplesThepreviouschaptersdescribethevariousmeth-odsandtechniquesdevelopedtoproducemean-ingfulandpracticalnetworkprogrammes.Inthischaptermostofthesetechniquesarecombinedintwofullyworkedexamples.Oneismainlyofacivilengineeringandbuildingnatureandth
2、eotherisconcernedwithmechanicalerection–botharepracticalandcouldbeappliedtorealsituations.Thefirstexamplecoverstheplanning,man-hourcontrolandcostcontrolofaconstructionprojectofabungalow.Beforeanyplanningworkisstarted,itisadvantageoustowritedownthesalientp
3、arametersofthedesignandconstruction,orwhatisgrandlycalledthe‘designandconstructionphilosophy’.Thisensuresthateveryonewhoparticipatesintheprojectknowsnotonlywhathastobedonebutwhyitisbeingdoneinaparticularway.Indeed,ifthedesignandconstructionphilosophyiscir
4、culatedbeforetheprogramme,time-andcost-savingsuggestionsmaywellbevolunteeredbysomerecipientswhich,ifacceptable,canbeincorporatedintothefinalplan.WorkedexamplesExample1SmallbungalowDesignandconstructionphilosophy1Thebungalowisconstructedonstripfootings.2Ex
5、ternalwallsareintwoskinsofbrickwithacavity.Internalpartitionsareinplasterboardontimberstudding.3Thefloorissuspendedonbrickpiersoveranoversiteconcreteslab.FloorboardsareT&Gpine.4Theroofistiledontimber-trussedrafterswithexternalgutters.5Internalfinishisplas
6、teronbrickfinishedwithemulsionpaint.6Constructionisbydirectlabourspeciallyhiredforthepurpose.Thisincludesspecialisttradessuchaselectricsandplumbing.7Theworkisfinancedbyabankloan,whichispaidfour-weeklyonthebasisofaregularsitemeasure.8Labourispaidweekly.Sup
7、pliersandplanthirearepaid4weeksafterdelivery.Materialsandplantmustbeordered2weeksbeforesiterequirement.9Theaveragelabourrateis￡5perhouror￡250perweekfora50-hourworkingweek.Thiscoverslabourersandtradesmen.Figure28.1Bungalow(sixrooms)257ProjectPlanningandCon
8、trol10Thecross-sectionofthebungalowisshowninFigure28.1andthesequenceofactivitiesissetoutinTable28.1,whichshowsthedependenciesofeachactivity.Alldurationsareinweeks.Theactivitylettersrefertotheactivitiesshownonthecros
