Using BIM quantification tools
This approach associates with the use of specialised Quantity TakeOff (QTO) software, that transfer the BIM models and their embedded information from BIM design tools into their system. Similar to the previous approach, these tools can support both the automated extraction and manual take-off features. They can generate visual take off diagrams while providing visualisation of models whereby the quantity surveyor can mark off the building components using colours enabling to cross check the take-off lists and to see which components have or have not been included in the estimate.
The items and assemblies are inter-linked and the quantity surveyors are able to insert additional annotations to the model to clarify the conditions whenever necessary during the quantification process. The approach provides an advantage for the quantity surveyors to work using familiar QTO software without having to possess an indepth understanding of BIM design platforms.
Furthermore, BIM is argued to be adding new complications to the cost estimating processes for quantity surveyor; including;
3D model management, navigation and model export, identification and linking building components to estimating data, rapid responses to changes and design alternatives along design development stages.
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