| Studerende: |
Daniel Roginski |
|
Hovedvejleder:
|
Jan Karlshøj, lektor, DTU Byg
|
| Projekttype: |
Kandidatspeciale |
| Projektperiode: |
Juli 2011 - November 2011 |
| ECTS-point: |
30 |
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The purpose of this study is to make an overview of existing problems in Danish construction industry regarding preparation of Quantity Takeoff material for bidding stage which determines reliability of bid price and to provide suggestions improving this process. This is done with a focus on use of Building Information Modelling tools.
Before digging into practical issues, theoretical part is provided which serves as a background for escalated issues. It includes description of construction bidding process, Building Information Modelling technology, Quantity Takeoff process from Building Information Modelling perspective, interoperability issue and Information Delivery Manual concept.
Project is developed mainly in three phases. First phase is based on the interviews conducted with project managers and estimators from consultancy and construction companies. In this phase overview of bidding process and issues related with quality of bidding material content from two different perspectives is provided. It presents interviewees’ opinion about existing practice of tendering process and issues related with bidding material content which makes it difficult to provide reliable bid price.
Second phase addresses issues related with capability of Building Information Modelling software to support bidding process. It is based on tests performed on chosen modelling applications. First test gives an overview of Quantity Takeoff in Tekla Structures. Then interoperability between different software is tested. It describes how Tekla Structures model behaves in Revit Architecture and Solibri Model Checker. Also one test was performed to check how Revit Architecture Model behaves in Solibri Model Checker. Last test describes the way to make Quantity Takeoff of Tekla Structure model in Solibri Model Checker following Information Delivery Manual requirements.
Third phase of the thesis is a sum up of information developed during first two phases. It highlights problems in bidding process and bidding material content which makes it difficult for contractor provide reliable bid price. Here also suggestions for highlighted problems are provided.