This thesis investigates the challenges of collaboration in the construction industry. This is relevant, as efficient collaboration between actors will contribute to more successful construction projects. This thesis first identifies collaboration barriers in the construction industry. Second, it examines strengths and weaknesses in three newer collaboration approaches; partnering, strategic partnerships and Public-Private Partnerships, as these are considered as measures taken to deal with the barriers. The analysis suggests that all of the presented approaches could serve as a means to overcome the identified barriers. The three newer collaboration approaches all require significant resources comparable to the traditional approaches. This thesis concludes that the approach, strategic partnerships, is the best suited as it allows for repetition and thereby efficient utilisation of the applied resources.

Acknowledging the existence of 2nd and 3rd generation partnering this thesis will focus on 3rd generation partnering as the theoretical applicability has been argued not to be limited to large scale projects thus it can also be applied in the context of smaller projects. Nevertheless, 3rd generation partnering, where a supply team get together independently of the developer, is currently used only in large scale projects, which excludes many developers from making use of this collaboration approach. Consequently, this thesis aims at developing a more agile approach to collaboration, that can be used on all types of projects without becoming more resource-intensive. This is carried out by utilising the power that is in the repetitive effect among the project participants, which means the way the projects are executed. Thus, the analysis in this thesis takes its point of departure in 3rd generation partnering with one main question and three sub-questions as presented below:

How can 3rd generation partnering serve as a means to enhance and disseminate collaboration in the construction industry?

\item How is 3rd generation partnering applied in the construction industry today?
\item How can 3rd generation partnering in the construction industry be optimised?
\item How can the optimised 3rd generation partnering be implemented and disseminated to the construction industry?

Sub-question 1 is answered by a thorough examination of a case project called TRUST, one of the only projects in Denmark applying 3rd generation partnering. The TRUST-project is based on a framework agreement including a large project portfolio offered by København Kommunes contractor division. Furthermore, a literature review and two qualitative interviews are conducted. The first interview is done in collaboration with an interview individual from the delivery-team and the second interview is held with one from the developer-team with the purpose of identifying strengths and weaknesses and other relevant aspects of 3rd generation partnering. This combined with expert statements and theories is the foundation for answering sub-question 2. This includes a suggested solution on how the 3rd generation partnering approach can be optimised and made more agile. Lastly, a discussion of how the optimised approach can be implemented is carried out to answer sub-question 3. This is performed by introducing Kurt Lewins "Unfreeze-Change-Refreeze" \hspace{1pt} change model with an appertaining implementation guide. This guide among other things includes a leaflet developed for the purpose of enhancing knowledge concerning the optimised approach to collaboration in the construction industry.