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Open Building

Area: Design, planning and building

Open Building is a term that was coined in the mid-1980s but is rooted in ideas from some twenty years earlier, when John Habraken first introduced the Support/Infill concept as a response to the rigidity and uniformity of the post-war mass-housing produced in the Netherlands (Habraken, 1961). Its fundamental principle involves separating the supporting structure of a building, considered a collective resource designed for durability, from the infill components, such as the walls and partitions that can be easily adapted to individual preferences and changing needs. This design approach places a strong emphasis on flexibility and adaptability, allowing buildings to evolve over time and be effortlessly modified or renovated to meet changing requirements. Furthermore, it encourages the participation of building occupants in the design and management of their homes, and it emphasizes the importance of creating buildings that are well-suited to their local context (Kendall, 2021).

The Open Building concept introduces a holistic approach to enhancing the adaptability of the built environment, considering social, technical, and organizational aspects (Cuperus, 2001). From a social perspective, Open Building advocates for an open architecture that empowers users to customize their living spaces according to their needs and preferences, accommodating unforeseen changes in the future. On an organisational level, it proposes a redistribution of the design control, enabling top-down decisions to establish a framework within which bottom-up processes can thrive. Lastly, from a technical perspective, it pursues a systematisation of building that allows for the installation, upgrading, or removal of industrialized sub-systems with minimal implications for the overall stability of the building.

This approach addresses some of the pressing challenges of the construction industry, offering the potential to enhance housing affordability and sustainability. By allowing greater flexibility in interior design and layouts, spaces can be easily reconfigured to meet changing needs, encouraging a shift towards long-term planning and fostering adaptable, future-ready living environments. Moreover, this strategy reduces the need for costly renovations and discourages demolitions, thus improving construction resilience and facilitating the seamless integration of new technologies. It successfully aligns the diverse objectives of multiple stakeholders, providing builders with a consistent support system, offering developers the freedom to experiment with layouts and ensure long-term functional performance, and granting users the possibility to make personalized choices. For decades, this inherent adaptability has been successfully applied in diverse building types, including shopping centres, office buildings, and hospitals. These buildings necessitate facilities that are 'change-ready', capable of accommodating changes over time, with a focus on long-term adaptability rather than short-term design adequacy (Kendall, 2017; Leupen, 2004).

Open Building promotes environmental sustainability through its ‘levels concept’, acknowledging that building components have varying lifespans. The disentanglement and clarity of these hierarchical levels and their interfaces promotes the longevity of infrastructures while enabling incremental renewal and innovation, an increasingly common need in the construction sector. Higher levels provide a framework for the lower levels, setting the overall parameters and constraints in which the lower ones can operate (Habraken, 1998). Additionally, Open Building encourages the separation of building elements into the ‘Shearing layers of change’ articulated by Steward Brand in 1994 (Brand, 1994). These layers provide flexibility and adaptability to the buildings as they can be designed, built, and maintained independently from each other, facilitating design for disassembly practices. Additionally, through a modular coordination of standardised components, not only it is possible to increase the collaboration in the design and construction process of housing, but also to encourage a proliferation of technical subsystems that can be continuously upgraded and scaled-up within an open framework (Kendall & Dale, 2023b).

In the housing realm, a key difference between traditional design and the Open Building approach is their underlying methods. Traditional design examines diverse household types and lifestyles from an anthropologic perspective, suggesting various typologies. In contrast, Open Building focuses on creating an open system with no predefined designs. Instead, it operates with a framework of rules, zones and categories to enable the customisation of each dwelling by the user (Habraken, 1976). The adoption of Open Building was a response to the rigidity and waste caused by continued adherence to functionalism where buildings were designed according to the “form-follows-function” principle and became obsolete or impractical for the coming generations and costly to maintain. On the other hand, open architecture can cater to local and cultural demands, embracing the complexity of the built environment by acknowledging that it cannot be fully controlled or shaped by a single agent (Kendall, 2013; Kendall & Dale, 2023a; Paulichen et al., 2019). This encourages community involvement in the design and construction process, creating a sense of ownership and fostering inclusivity.

There are many examples across Europe of residential Open Building such as Gleis 21 in Austria, R50 Cohousing in Germany, or Stories in Netherlands. Other cases have been developed as open systems rather than individual projects, replicated and adapted to diverse locations but following the same strategy, as for example the Superlofts by Mark Koehler Architects, which since 2016 has built seven projects in the Netherlands out of this system. Determining whether a project is an Open Building and the degree of flexibility it offers can be measured through a classification chart developed by the Open Building Collective, which is based in the principles showcased in their Manifesto. The dissemination of these exemplary projects through publications (Schneider & Till, 2007), awards, conferences and the Open Building Collective, has stimulated the exchange of knowledge between researchers, practitioners and other stakeholders, spreading the interest in this concept and its practical implementation.

Despite its potential benefits, the implementation of Open Building in multi-family housing faces challenges due to entrenched traditional practices, regulatory barriers favouring fixed layouts, and the short-term perspectives among developers, investors, and clients (De Paris & Lopes, 2018; Montaner et al., 2015). However, successful Open Building projects around the globe demonstrate that its capacity to address holistically the social, technical, and organizational aspects of a changing society. It encourages the space appropriation at the infill level while ensuring resilience and robustness in the support level, fostering enduring and inclusive buildings that allow diverse households to coexist and evolve over time (Kendall, 2022).

References

Brand, S. (1994). How Buildings Learn: What Happens After They’re Built. Penguin Books.

Cuperus, Y. (2001). An introduction to open building. Proceedings of the 9th Annual Conference of the 9th Annual Conference of the International Group for Lean Construction.

De Paris, S. R., & Lopes, C. N. L. (2018). Housing flexibility problem: Review of recent limitations and solutions. Frontiers of Architectural Research, 7(1). https://doi.org/10.1016/j.foar.2017.11.004

Habraken, J. (1976). Variations: The Systematic Design of Supports. MIT Press.

Habraken, N. J. (1961). Supports: An Alternative to Mass Housing. Routledge. https://doi.org/10.4324/9781003014713

Habraken, N. J. (1998). The Structure of the Ordinary (J. Teicher, Ed.). MIT Press.

Kendall, S. (2017). Four decades of open building implementation: Realising individual agency in architectural infrastructures designed to last. Architectural Design, 87(5). https://doi.org/10.1002/ad.2216

Kendall, S. (2022). Residential Open Building projects in a number of countries. In Residential Architecture as Infrastructure (1st ed., pp. 1–22). Routledge. https://doi.org/10.4324/9781003018339

Kendall, S. H. (2013). The next wave in housing personalisation: Customised residential fit-out. In Mass Customisation and Personalisation in Architecture and Construction (Vol. 9780203437735). https://doi.org/10.4324/9780203437735

Kendall, S. H. (2021). Residential Architecture as Infrastructure. In Residential Architecture as Infrastructure. https://doi.org/10.4324/9781003018339

Kendall, S. H., & Dale, J. R. (2023a). Involving people in the housing process. In The Short Works of John Habraken. https://doi.org/10.4324/9781003011385-18

Kendall, S. H., & Dale, J. R. (2023b). Open Building as a condition for industrial construction. In The Short Works of John Habraken. https://doi.org/10.4324/9781003011385-46

Leupen, B. (2004). The Frame and the Generic Space , a New Way of Looking to Flexibility. Open Building and Sustainable Environment. The 10th Annual Conference of the CIB W104 Open Building Implementation.

Montaner, J. M., Habraken, N. J., & Sainz, J. (2015). La arquitectura de la vivienda colectiva: políticas y proyectos en la ciudad contemporánea. In Estudios universitarios de arquitectura (Vol. 26). Revert.

Paulichen, L., Leite, R. M., Mikami, S. A., & Pina, G. (2019). Resilience in architecture: Housing as a process. Strategic Design Research Journal, 12(2). https://doi.org/10.4013/SDRJ.2019.123.06

Schneider, T., & Till, J. (2007). Flexible housing. Elsevier.

Created on 14-11-2023 | Update on 15-11-2023

Related definitions

Area: Community participation

According to the Oxford English Dictionary, participation is “the act of taking part in an activity or event”. Likewise, it can also mean “the fact of sharing or the act of receiving or having a part of something.” It derives from old French participacion which in turn comes from late Latin participationem, which means “partaking” (Harper, 2000).  References to participation can be found in many fields, including social sciences, economics, politics, and culture. It is often related to the idea of citizenship and its different representations in society. Hence, it could be explained as an umbrella concept, in which several others can be encompassed, including methodologies, philosophical discourses, and tools. Despite the complexity in providing a holistic definition, the intrinsic relation between participation and power is widely recognised. Its ultimate objective is to empower those involved in the process (Nikkhah & Redzuan, 2009). An early application of participatory approaches was the Participatory Rural Appraisal (PRA) which exerted a significant influence in developing new discourses and practices of urban settings (Chambers, 1994; Friedmann, 1994). In the late 1970s increasing attention was paid to the concept by scholars, and several associated principles and terminologies evolved, such as the participation in design and planning with the Scandinavian approach of cooperative design (Bφdker et al., 1995; Gregory, 2003). Participation in design or participatory design is a process and strategy that entails all stakeholders (e.g. partners, citizens, and end-users) partaking in the design process. It is a democratic process for design based on the assumption that users should be involved in the designs they will go on to use (Bannon & Ehn, 2012; Cipan, 2019; Sanoff, 2000, 2006, 2007). Likewise, participatory planning is an alternative paradigm that emerged in response to the rationalistic and centralized – top-down – approaches. Participatory planning aims to integrate the technical expertise with the preferences and knowledge of community members (e.g., citizens, non-governmental organizations, and social movements) directly and centrally in the planning and development processes, producing outcomes that respond to the community's needs (Lane, 2005). Understanding participation through the roles of participants is a vital concept. The work of Sherry Arnstein’s (1969) Ladder of Citizen Participation has long been the cornerstone to understand participation from the perspective of the redistribution of power between the haves and the have-nots. Her most influential typological categorisation work yet distinguishes eight degrees of participation as seen in Figure 1: manipulation, therapy, placation, consultation, informing, citizen control, delegated power and partnership. Applied to a participatory planning context, this classification refers to the range of influence that participants can have in the decision-making process. In this case, no-participation is defined as designers deciding based upon assumptions of the users’ needs and full-participation refers to users defining the quality criteria themselves (Geddes et al., 2019). A more recent classification framework that also grounds the conceptual approach to the design practice and its complex reality has been developed by Archon Fung (2006) upon three key dimensions: who participates; how participants communicate with one another and make decisions together, and how discussions are linked with policy or public action. This three-dimensional approach which Fung describes as a democracy cube (Figure 2), constitutes a more analytic space where any mechanism of participation can be located. Such frameworks of thinking allow for more creative interpretations of the interrelations between participants, participation tools (including immersive digital tools) and contemporary approaches to policymaking. Aligned with Arnstein’s views when describing the lower rungs of the ladder (i.e., nonparticipation and tokenism), other authors have highlighted the perils of incorporating participatory processes as part of pre-defined agendas, as box-ticking exercises, or for political manipulation. By turning to eye-catching epithets to describe it (Participation: The New Tyranny? by Cooke & Kothari, 2001; or The Nightmare of Participation by Miessen, 2010), these authors attempt to raise awareness on the overuse of the term participation and the possible disempowering effects that can bring upon the participating communities, such as frustration and lack of trust. Examples that must exhort practitioners to reassess their role and focus on eliminating rather than reinforcing inequalities (Cooke & Kothari, 2001).

Created on 17-02-2022 | Update on 08-03-2022

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Sustainability Built Environment

Author: M.Alsaeed (ESR5), K.Hadjri (Supervisor)

Area: Design, planning and building

Sustainability of the built environment The emergence of the contemporary environmental movement between the 1960s and 1970s and its proposals to remedy the consequences of pollution can be seen as one of the first steps in addressing environmental problems (Scoones, 2007). However, the term “sustainable” only gained wider currency when it was introduced into political discourse by the Club of Rome with its 1972 report “The Limits to Growth”, in which the proposal to change growth trends to be sustainable in the far future was put forward (Grober, 2007; Kopnina & Shoreman-Ouimet, 2015a; Meadows et al., 1972). Since then, the use of the term has grown rapidly, especially after the publication of the 1978 report “Our Common Future”, which became a cornerstone of debates on sustainability and sustainable development (Brundtland et al., 1987; Kopnina & Shoreman-Ouimet, 2015a). Although the two terms are often used indistinctively, the former refers to managing resources without depleting them for future generations, while the latter aims to improve long-term economic well-being and quality of life without compromising the ability of future generations to meet their needs (Kopnina & Shoreman-Ouimet, 2015b; UNESCO, 2015). The Brundtland Report paved the way for the 1992 Earth Summit, which concluded that an effective balance must be found between consumption and conservation of natural resources (Scoones, 2007). In 2000, the United Nations General Assembly published the 8 Millennium Development Goals (UN, 2000), which led to the 17 Sustainable Development Goals (SDGs) published in 2016 (UN, 2016). The 17 SDGs call on all countries to mobilise their efforts to end all forms of poverty, tackle inequalities and combat climate change (UN, 2020; UNDP, 2018). Despite the rapidly growing literature on sustainability, the term remains ambiguous and lacks a clear conceptual foundation (Grober, 2007; Purvis et al., 2019). Murphy (2012) suggests that when defining sustainability, the question should be: Sustainability, of what? However, one of the most prominent interpretations of sustainability is the three pillars concept, which describes the interaction between the social, economic and environmental components of society (Purvis et al., 2019). The environmental pillar aims to improve human well-being by protecting natural capital -e.g. land, air and water- (Morelli, 2011). The economic sustainability pillar focuses on maintaining stable economic growth without damaging natural resources (Dunphy et al., 2000). Social sustainability, on the other hand, aims to preserve social capital and create a practical social framework that provides a comprehensive view of people's needs, communities and culture (Diesendorf, 2000). This latter pillar paved the way for the creation of a fourth pillar that includes human and culture as a focal point in sustainability objectives (RMIT, 2017). Jabareen (2006) describes environmental sustainability as a dynamic, inclusive and multidisciplinary concept that overlaps with other concepts such as resilience, durability and renewability. Morelli (2011) adds that it can be applied at different levels and includes tangible and intangible issues. Portney (2015) takes Morelli's explanation further and advocates that environmental sustainability should also promote industrial efficiency without compromising society's ability to develop (Morelli, 2011; Portney, 2015). Measuring the built environment sustainability level is a complex process that deploys quantitative methods, including (1) indexes (e.g. energy efficiency rate), (2) indicators (e.g. carbon emissions and carbon footprint), (3) benchmarks (e.g. water consumption per capita) and (4) audits (e.g. building management system efficiency) (Arjen, 2015; Berardi, 2012; James, 2014; Kubba, 2012). In recent years, several rating or certification systems and practical guides have been created and developed to measure sustainability, most notably the Building Research Establishment Environmental Assessment Method (BREEAM) introduced in the UK in 1990 (BRE, 2016) and the Leadership in Energy and Environmental Design (LEED) established in the US in 2000 (USGBC, 2018). In addition, other overlapping methodologies and certification frameworks have emerged, such as the European Performance of Buildings Directive (EPBD) in 2002 (EPB, 2003) and the European Framework for Sustainable Buildings, also known as Level(s) in 2020 (EU, 2020), amongst others. The sustainability of the built environment aims to reduce human consumption of natural resources and the production of waste while improving the health and comfort of inhabitants and thus the performance of the built environment elements such as buildings and spaces, and the infrastructure that supports human activities (Berardi, 2012; McLennan, 2004). This aim requires an effective theoretical and practical framework that encompasses at least six domains, including land, water, energy, indoor and outdoor environments, and economic and cultural preservation (Ferwati et al., 2019). More recently, other domains have been added, such as health and comfort, resource use, environmental performance, and cost-benefit and risk (EU, 2020). Sustainability of the built environment also requires comprehensive coordination between the architectural, structural, mechanical, electrical and environmental systems of buildings in the design, construction and operation phases to improve performance and avoid unnecessary resource consumption (Yates & Castro-Lacouture, 2018).

Created on 24-06-2022 | Update on 16-11-2022

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Mass Customisation

Author: C.Martín (ESR14)

Area: Design, planning and building

Mass customisation (MC) is a process by which a company approaches its production in a customer-centric manner, developing products and services according to the needs and requirements of each individual customer, while keeping costs near to mass production (Piller, 2004). MC establishes a new relationship between producers and customers which becomes crucial in product development  (Khalili-Araghi & Kolarevic, 2016). Alvin Toffler (1970, 1980) was the first to refer to the MC concept in his books “Future shock”  and “The third wave”. Stanley Davis (1987) later cemented the term in his book “Future Perfect”. But it was not until 1993, when Joseph Pine  developed its practical application to business, that the concept started gaining greater importance in research and practice (Pine, 1993; Brandão et al., 2017; Piller et al., 2005). Nowadays, MC is understood as a multidimensional process embracing a combination of mass production, user-driven technologies, big data, e-commerce and e-business, digital design, and manufacturing technologies (Brandão et al., 2017). In the last twenty years, almost every sector of the economy, from industrial production to consumer products and services, has been influenced by mass customisation. The difference between mass customisation and massive customisation is the ability to relate the contextual features to the product features. This means that a random generation of design alternatives would not be sufficient; these alternatives should be derived from the cultural, technological, environmental and social context, as well as from the individual context of the user (Kolarevic & Duarte, 2019). As a business paradigm,  MC provides an attractive added value by addressing customer needs while using resources efficiently and avoiding an increase in operational costs (Piller & Tseng, 2009). It seeks to incorporate customer co-design processes into the innovation and strategic planning of the business, approaching economies of integration (Piller et al., 2005). As a result, the profitability of MC is achieved through product variety in volume-related economies (Baranauskas et al., 2020; Duray et al., 2000). The space in which it is possible to meet a variety of needs through a mass customisation offering is finite (Piller, 2004). This solution space represents the variety of different customisation units and encompasses the rules to combine them, limiting the set of possibilities in the search of a balance between productivity and flexibility (Salvador et al., 2009). The designer’s responsibility would be to meet the heterogeneities of the users in an efficient way, by setting a solution space and defining the degrees of freedom for the customer within a manufacturer’s production system (Hippel, 2001). Therefore, an important challenge for a company that aims at becoming a mass customizer is to find the right balance between what is determined by the designer and what is left for the user to decide (Kolarevic & Duarte, 2019). Value creation within a stable solution space is one of the major differences between traditional customisation. While a traditional customizer produces unique products and processes, a mass customizer uses stable processes to provide a high range of variety among their products and services (Pine, 1993). This would enable a mass customizer to achieve “near mass production efficiency” but would also mean that the customisation alternatives are limited to certain product features (Pine, 1995). As opposed to the industrial output of mass production, in which the customer selects from options produced by the industry, MC facilitates cultural production, the personalisation of mass products in accordance with individual beliefs. This means that the customer contributes to defining the processes, components, and features that will be involved in the flow of the design and manufacturing process (Kieran & Timberlake, 2004). Products or services that are co-designed by the customer may provide social benefits, resulting in tailor-made, fitting, and resilient outcomes (Piller et al., 2005). Thanks to parametric design and digital fabrication it is now viable to mass-produce non-standard, custom-made products, from tableware and shoes to furniture and building components. These are often customizable through interactive websites (Kolarevic & Duarte, 2019). The incorporation of MC into the housebuilding industry, through supporting, guiding, and informing the user via interactive interfaces (Madrazo et al., 2010), can contribute to a democratisation of housing design, allowing for an empowering, social, and cultural enrichment of our built environment. Our current housing stock is largely homogeneous, while customer demands are increasingly heterogeneous. Implementing MC in the housing industry could address the diverse consumer needs in an affordable and effective way, by creating stable solution spaces that could make good quality housing accessible to more dwellers. Stability and responsiveness are key in the production of highly customised housing. Stability can be achieved through product modularity, defining and producing a set of components that can be combined in the maximum possible ways, attaining responsiveness to different requests while reducing the complexity of product variation. This creates customisation alternatives within the solution space which require a smooth flow of information and effective collaboration between customers, designers, and manufacturers (Khalili-Araghi & Kolarevic, 2018). ICT technologies can help to effectively materialise this multidimensional and interdisciplinary challenge in the Architecture, Engineering and Construction (AEC) industry, as showcased in the Sato PlusHome multifamily block in Finland[1]. Nowadays, there are companies that have integrated a systematic methodology to produce mass customised single-family homes using prefabrication methods, such as Modern Modular[2]. On the other hand, platforms such as BIM that act as collaborative environments for all stakeholders have demonstrated that building performance can be increased and precision improved while reducing construction time. These digital twins offer a basis for fabricated components and enable early cooperation between different disciplines. Parametric tools have the potential to help customisation comply with the manufacturing rules and regulations, and increase the ability to sustainably meet customer requirements, using fewer resources and shorter lead times (Piroozfar et al., 2019). In summary, a mass customisable housing industry could be achieved if the products and services are parametrically defined (i.e., specifying the dimensions, constraints, and relationships between the various components), interactively designed (via a website or an app), digitally fabricated, visualised and evaluated to automatically generate production and assembly data (Kolarevic, 2015). However, for MC to be integrated effectively in the AEC industry, several challenges remain that range from cultural, behavioural and management changes, to technological such as the use of ICTs or those directly applied to the manufacturing process, as for example automating the production and assembly methods, the use of product configurators or managing the variety through the product supply chain (Piroozfar et al., 2019).   [1] Sato PlusHome. ArkOpen / Esko Kahri, Petri Viita and Juhani Väisänen (http://www.open-building.org/conference2011/Project_PlusHome.pdf) [2] The Modern Modular. Resolution: 4 Architecture (https://www.re4a.com/the-modern-modular)

Created on 06-07-2022 | Update on 06-07-2022

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Design for Dissassembly

Author: A.Davis (ESR1)

Area: Design, planning and building

Design for Disassembly (DfD), also referred to as Design for Deconstruction or Construction in Reverse, is the design and planning of the future disassembly of a building, in addition to its assembly (Cruz Rios & Grau, 2019). Disassembly enables the non-destructive recovery of building materials to re-introduce resources back into the supply chain, either for the same function or as a new product. Designing buildings for their future disassembly can reduce both the consumption of new raw materials and the negative environmental impacts associated with the production of new building products, such as embodied carbon. DfD is considered the “ultimate cradle-to-cradle cycle strategy” (Smith, 2010, p.222) that has the potential to maximise the economic value of materials whilst minimising harmful environmental impacts. It is therefore a crucial technical design consideration that supports the transition to a Circular Economy. Additional benefits include increased flexibility and adaptability, optimised maintenance, and retention of heritage (Rios et al., 2015). DfD is based on design principles such as: standardised and interchangeable components and connections, use of non-composite products, dry construction methods, use of prefabrication, mechanical connections as opposed to glues and wet sealants, designing with safety and accessibility in mind, and documentation of materials and methods for disassembly (Crowther, 2005; Guy & Ciarimboli, 2008; Tingley & Davison, 2011). DfD shares commonality with Industrialised Construction, which often centres around off-site prefabrication. Industrialising the production of housing can therefore be more environmentally sustainable and financially attractive if building parts are produced at scale and pre-designed to be taken apart without destroying connecting parts. Disassembly plays an important role in the recovery of building materials based on the 3Rs principle (reduce, reuse, recycle) during the maintenance, renovation, relocation and reassembly, and the end-of-life phases of a building. Whilst a building is in use, different elements are expected to be replaced at the end of their service life, which varies depending on its function. For example, the internal layout of a building changes at a different rate to the building services, and the disassembly of these parts would therefore take place at different points in time. Brand’s (1994) Shearing Layers concept incorporates this time aspect by breaking down a building into six layers, separating the “site”, “structure”, “skin” (building envelope), “services”, “space plan”, and “stuff” (furniture) to account for their varying lifespans. DfD enables the removal, replacement, and reuse of materials throughout the service life of a building, extending it use phase for as long as possible. However, there is less guarantee that a building will be disassembled at the end of its service life, rather than destructively demolished and sent to landfill.

Created on 18-10-2023 | Update on 13-11-2023

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Industrialised Construction

Author: C.Martín (ESR14), A.Davis (ESR1)

Area: Design, planning and building

Industrialised Construction, also referred to as Modern Methods of Construction in the UK (Ministry of Housing, 2019) and Conceptueel Bouwen (Conceptual Building) in the Netherlands (NCB, n.d.), is a broad and dynamic term encompassing innovative techniques and processes that are transforming the construction industry (Lessing, 2006; Smith & Quale, 2017). It is a product-based approach that reinforces continuous improvement, rather than a project-based one, and emphasises the use of standardised components and systems to improve build quality and achieve sustainability goals (Kieran & Timberlake, 2004).  Industrialised Construction can be based on using a kit-of parts and is often likened to a LEGO set, as well as the automotive industry's assembly line and lean production. Industrialisation in the construction sector presents a paradigm shift, driven by advancements in technology (Bock & Linner, 2015). It involves both off-site and on-site processes, with a significant portion occurring in factory-controlled conditions (Andersson & Lessing, 2017). Off-site construction entails the prefabrication of building components manufactured using a combination of two-dimensional (2D), three-dimensional (3D), and hybrid methods, where traditional construction techniques meet cutting-edge technologies such as robotic automation. Industrialised construction is not limited to off-site production, it also encompasses on-site production, including the emerging use of 3D printing or the deployment of temporary or mobile factories. Industrialised Construction increasingly leverages digital and industry 4.0 technologies, such as Building Information Modelling (BIM), Internet of Things, big data, and predictive analysis (Qi et al., 2021). These processes and digital tools enable accurate planning, simulation, and optimisation of construction processes, resulting in enhanced productivity, quality, and resource management. It is important to stress that Industrialised Construction is not only about the physical construction methods, but also the intangible processes involved in the design and delivery of buildings. Industrialised construction offers several benefits across economic, social, and environmental dimensions. From an economic perspective, it reduces construction time and costs in comparison to traditional methods, while providing safer working conditions and eliminates delays due to adverse weather. By employing standardisation and efficient manufacturing processes, it enables affordable and social housing projects to be delivered in a shorter timeframe through economies of scale (Frandsen, 2017). On the social front, Industrialised Construction can enable mass customisation and customer-centric approaches, to provide more flexible solutions while maintaining economic feasibility (Piller, 2004). From an environmental standpoint, industrialised construction minimises waste generation during production by optimising material usage and facilitates the incorporation of Design for Disassembly (Crowther, 2005) and the potential reusability of building elements, promoting both flexibility and a Circular Economy (EC, 2020). This capability aligns with the principles of cradle-to-cradle design, wherein materials and components are continuously repurposed to reduce resource depletion and waste accumulation. Challenges remain in terms of overcoming misconceptions and gaining social acceptance, the slow digital transformation of the construction industry, high factory set-up costs, the lack of interdisciplinary integration of stakeholders from the initial stages, and adapting to unconventional workflows. However, Industrialised Construction will undoubtedly shape the future of the built environment, providing solutions for the increasing demand for sustainable and affordable housing (Bertram et al., 2019).

Created on 09-11-2023 | Update on 10-11-2023

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