VTeorifivceartiifoyn othf tehedDeseisgingneedd mMooddeell,bythCeasceaSsetusdtyudy's data was used. The costs of environmental management's work packages were calculated for various project phases by using Equation (3) and the mTaorkveetr-ibfyastehdepdreicseig, ntaekdinmgoidnetol, ctohnes...