3、控制天津理工大学2010届本科毕业论文Research on RiskControlling of EngineeringVariation underDBBPatternABSTRACTEngineeringvariationistheimportantcontentofconstructioncontractmanagementandisthekeyfactorofprojectschedulecontrol,qualitycontrolandinvestmentcontrol.Itisimportantforachievingthegoalofconstructioncontr