?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F753%2F&rft.title=Workflow+Modelling+of+Construction+Projects&rft.creator=Murphy%2C+E.&rft.creator=Champneys%2C+A.&rft.creator=Batarfi%2C+Hanan&rft.creator=Barter%2C+Edmund&rft.creator=Budd%2C+Chris&rft.creator=Dong%2C+Ran&rft.creator=Foniok%2C+Jan&rft.creator=Kulesza%2C+Kamil&rft.creator=Lacey%2C+Andrew&rft.creator=Li%2C+Xiaodong&rft.creator=Rodrigues%2C+Francisco&rft.creator=Wendland%2C+Alex&rft.creator=Yim%2C+Ambrose&rft.subject=Machines+%2F+Production&rft.description=This+report+details+the+work+carried+out+by+the+Study+Group+on+workflow+modelling+of+con-+struction+projects.%0D%0AData+on+the+progress+of+about+a+hundred+projects+over+a+single+five-year+planning+period+were+provided+by+Heathrow+Airport+(the+client)+and+their+four+Tier+1+construction+contrac-+tors.+These+data+are+mapped+and+analysed.+Several+unusual+features+are+discovered.+For+example%2C+most+projects+undergo+several+tens+of+adjustments+in+their+scope+and+price+such+that+while+most+projects+are+technically+completed+under+budget%2C+the+price+and+duration+is+significantly+higher+than+originally+planned.%0D%0AThe+main+question+addressed+was+whether+an+optimised+scheduling+of+the+project+would+lead+to+decreased+costs+and+more+rapid+completion.%0D%0AFirst%2C+a+machine+learning+approach+is+used+to+gain+insight+onto+which+factors+are+most+significant+in+predicting+the+final+cost+and+duration+of+each+project.+If+more+data+were+available%2C+these+methods+could+be+further+exploited+to+allow+for+predictions+to+be+made+on+which+projects+are+likely+to+over-run+or+go+over+budget+and+to+examine+connections+between+projects+at+the+subcontractor+level.%0D%0AIn+addition+to+the+data-centric+approach%2C+a+complementary+mathematical+model+was+de-+veloped+to+gain+a+better+understanding+of+the+effect+of+resource+constraints+on+cost+and+price+extension+due+to+resource+competition+of+concurrent+projects%2C+ignoring+the+confound-+ing+effect+of+scope+creep+seen+in+the+data.+The+model+takes+the+form+of+a+discrete+time+stochastic+simulation%2C+whose+parameters+are+fit+to+the+existing+data.+Tentative+conclusions+from+the+model+indicate+that+better+outcomes+can+be+achieved+by+spreading+out+project+start+dates%2C+and+by+prioritising+completion+of+smaller+projects.%0D%0AWhile+more+data+is+needed+to+validate+the+model%2C+the+results+suggested+that+gains+can+be+made+if+more+thoughtful+scheduling+of+projects+is+implemented%2C+and+also+if+the+prioritisation+of+projects+is+monitored+and+adjusted+intelligently.%0D%0AOur+major+recommendation+to+Heathrow+Airport+is+to+collect+or+retrieve+more+data%2C+as+outlined+in+the+report%2C+so+that+both+models+can+be+made+more+realistic+and+useful.+This+would+allow+Heathrow+Airport+and+their+contractors+to+develop+and+test+strategies+to+make+the+system+more+efficient%2C+ultimately+saving+time+and+money.&rft.date=2018&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F753%2F1%2Fesgi-heathrow.pdf&rft.identifier=++Murphy%2C+E.+and+Champneys%2C+A.+and+Batarfi%2C+Hanan+and+Barter%2C+Edmund+and+Budd%2C+Chris+and+Dong%2C+Ran+and+Foniok%2C+Jan+and+Kulesza%2C+Kamil+and+Lacey%2C+Andrew+and+Li%2C+Xiaodong+and+Rodrigues%2C+Francisco+and+Wendland%2C+Alex+and+Yim%2C+Ambrose++(2018)+Workflow+Modelling+of+Construction+Projects.++%5BStudy+Group+Report%5D+++++