Most of the more persistent man-made structural assets that surround us in everyday life as well as their reliable structural services are normally taken ‘as a law of nature’ by the general public. Compared to consumer products the service levels of structural assets are extremely high. Bridges with a structural failure rate comparable to that of normal office printers would be considered completely unacceptable, while a tunnel would never be built if they had a service life expectancy comparable to the most long-lasting functional products such as (certain) washing machines or Hi-Fi-systems. The same holds for all built structures, including houses, public and commercial buildings.

Meanwhile, these structural assets together exceed in financial terms the balance of any global financial institution or the yearly budget of e.g. the Dutch government many times. Thus, the importance and impact of the broad field of science and engineering related to the built environment - which includes architecture, architectural engineering, civil engineering, process management, and policy - is not be underestimated, both economically and socially.

Notwithstanding the evident importance of the Built Environment sector, the public perception of this sector is not that positive, a trend that has been developing in the past few decades. The public perception of the sector often leans towards non-innovative, somewhat clumsy, disorganised and conservative.

It is often forgotten that inventions and innovations from any field of science and engineering are finally applied in the context of the built environment. Developments with respect to e.g. energy comfort, new building materials, and systems are spectacular. For instance, no other innovation has increased the life expectancy of people as much as the broad application of developments in sanitary engineering. It is even so, that the difference between developed an developing countries can be largely attributed to the quality of public sanitation systems. Apparently, the development of an adequate and efficient sanitation system requires the effective collaboration within the so-called ‘Golden Triangle’, i.e. stable and facilitating governments, trained people and innovation originating from educational and scientific institutions and energetic application by these innovations by the market.

Moreover, the environmental impact of the ‘building sector’ is huge, given the enormous usage of raw materials. Together with the energy sector, the building sector is at the forefront of addressing great societal challenges related to sustainability, scarcity, and availability of raw materials as well as the transition towards a circular economic model, based on recycling and upcycling of waste materials and structures.

Another development is the need for true multidisciplinary and cross-disciplinary collaboration on these challenges. Almost every field of science and engineering has found its application in the built environment. Developments within quantum mechanics have led to diverse developments like energy efficient lighting (LED), precise positioning and cutting (laser technologies) and of course to the revolutionary introduction of ICT in the built environment. Developments in (micro-) biology have led to the aforementioned sanitation revolution, whereas new insights into the mathematics of planning and operations research allowed building processes at scales that would have never been possible before.

An effective and multidisciplinary approach faces grand challenges ahead, requiring dedication and collaboration. Therefore, the four technical universities decided to collaborate – amongst others – as 4TU.Bouw Center of Excellence for the Built Environment. The 4TU.Bouw Center of Excellence consists of the faculties of Architecture and Civil Engineering and Geosciences at Delft University of Technology, the Department of the Built Environment at Eindhoven University of Technology, the faculty of Engineering Technology at Twente University and Wageningen University & Research. The overall goal of this 4TU initiative is to promote close collaboration between Dutch universities in order to increase competitiveness in international research and education and to concentrate research and education efforts to improve efficiency and scientific excellence.

Led by scientific director Ulrich Knaack during a four-year period from 2014 till 2017, 4TU.Bouw focused on activating and developing the abovementioned collaborative ambitions. Specifically, by means of three programs, supported with a communication strategy directed towards a broader audience than the academic world alone. The Lighthouse Project initiative that actively pursued imaginary research proposals following a funding setup that resembled an ‘angel capital’ approach; reasonable ‘easy’ money for intensive and short-term ‘proof of concept’ or ‘proof of failure’ proposals. Not all had to succeed in a traditional way, which was made up by the number of projects and their ambitious goals. Secondly, 4TU.Bouw supported the dedicated PDEng-training program contributing to the future availability of well-trained specialists while bridging the gap between academia and the market. Lastly, there were various collaborations with other knowledge institutes and market branch organisations to collectively inform politicians and policy decisionmakers on the relevance and urgency of built environment research and education in order effectively face the nation-wide social and cultural challenges lying ahead.

3TU.Bouw represents the collaboration between the 3 Technical Universities in the Netherlands on the large topic of ‘The Built Environment’. The cooperation consists of the Department of the Built Environment at TU Eindhoven, the faculty of Engineering Technology at Twente University, and the faculties of Architecture and Civil Engineering and Geosciences at TU Delft. The goal of the 3TU.Bouw initiative is to promote collaboration between the member faculties, industrial partners and government, in order to meet the grand challenges ahead.

Built Environment is the biotope of the modern citizen, providing infrastructure for transport, defence against flooding, shelter, space for working, meeting and leisure activities, etc. The demands upon reliability, safety and comfort of these structures is continuously increasing. Meanwhile the Built Environment sector is confronted with enormous challenges like scarcity of resources, climate change, accelerated population growth and demographic changes. These challenges require joint strategies and collaboration between end-user, academia, the industry and governmental agencies, the so-called golden triangle. Therefore, in the context of the Dutch ‘Nationale Wetenschapsagenda’, 3TU.Bouw, with its partners, has identified the important, societal and scientifically relevant research themes: ‘De Toekomst Wordt Gebouwd’.

These themes have been utilized as context for the 3TU.Bouw Lighthouse programme 2016: fifteen dedicated, fast track innovation projects have been started, all addressing aspects of the agenda. These projects should provide a proof of concept – or failure – of new technologies that will contribute to solid approaches and solutions to the challenges ahead, for all stakeholders. Next to this, a dedicated PDEng-training programme contributes to the future availability of well-trained specialists, meanwhile bridging the gap between academia and the market. 3TU.Bouw strives to respond rapidly to the ever faster changes, often emerging bottom-up, that new technologies bring about, by organizing workshops, brainstorms and training sessions with relevant stakeholders, and by forming dedicated consortia that act jointly. Only by such joint actions positive changes with respect to the urgent themes are expected to happen.