"uuid","repository link","title","author","contributor","publication year","abstract","subject topic","language","publication type","publisher","isbn","issn","patent","patent status","bibliographic note","access restriction","embargo date","faculty","department","research group","programme","project","coordinates"
"uuid:25716e03-e968-47fe-b1fe-f79306854fa2","http://resolver.tudelft.nl/uuid:25716e03-e968-47fe-b1fe-f79306854fa2","Comparing Circular Kitchens: A Study of the Dutch Housing Sector","Jansen, B. (TU Delft Real Estate Management; Amsterdam Institute for Advanced Metropolitan Solutions (AMS)); Duijghuisen, J.A.K. (TU Delft Support Management in the Built Environment); van Bortel, G.A. (TU Delft Real Estate Management); Gruis, V.H. (TU Delft Real Estate Management)","","2023","The built environment can become more sustainable by gradually replacing building components with circular ones. Kitchens are a logical component to be made circular, given their relatively short lifespan, product-based nature, and affordable prototypes. Since various designs for circular kitchens can be developed, understanding the feasibility of these designs is crucial for their successful implementation. This knowledge, however, remains limited. Therefore, this article aimed to determine which types of circular kitchens are feasible. Circular kitchens available or announced in the Dutch housing sector within the past five years were compared using an adapted version of the CBC generator, a comprehensive design framework for circular building components. The comparison included the Circular Kitchen (CIK), developed as part of an international research project. Data were sourced from manufacturers’ websites and online publications supplemented by interviews with two outliers to verify the results. The analysis encompassed seven circular kitchens, with two developed by established manufacturers and five by start-ups. The manufacturers mostly communicated about their kitchen’s physical design. The established manufacturers’ circular kitchens were found to be more similar to their non-circular kitchens, while start-ups applied more radical innovations. Furthermore, the kitchens that had a frame structure using technical materials or a panel-based structure using biological materials were more likely to be feasible. These findings can facilitate future circular kitchen development by improving these kitchens’ feasibility, thus aiding the transition to a more circular built environment. Furthermore, this research contributes scientifically by adapting a comprehensive design framework (the CBC generator) to compare circular designs.
Performance, as used in this textbook, is the extent to which the current state of a focus area corresponds to its desired state. The concept is very familiar to all of us: we check performance naturally and frequently throughout the day as we examine whether our actions have produced the desired results and use this information to plan new actions. For example, when preparing a meal, we frequently check that the vegetables are cooking according to the recipe (performance measurement) and appropriately adjust the heat of the oven (performance management). This textbook focuses on the technique of performance measurement, with occasional references to what management can do with the results of performance measurement.","","en","book","Delft University of Technology","","","","","","","","","","Real Estate Management","","",""
"uuid:70de3f49-3010-4a22-a276-330c39ad4d26","http://resolver.tudelft.nl/uuid:70de3f49-3010-4a22-a276-330c39ad4d26","Lean Co-Acting With Circularity?: An Investigation in Product-Service Systems in Rental Housing","Parker, David (Student TU Delft); Jylhä, Tuuli E. (Aalto University); van Bortel, G.A. (TU Delft Real Estate Management); Schraven, D.F.J. (TU Delft Real Estate Management)","","2023","Circularity is positioned as an alternative model to achieve sustainable prosperity. Lean construction highlights not only building delivery with less but also contributing to sustainable development. However, lean is criticized for reducing waste only within organizational boundaries while neglecting the impact of waste beyond the boundaries. On the contrary, circularity originates to reduce waste in the system and is currently seeking approaches to implement waste reduction in circular production. To speed up the transition to sustainable resource consumption, the co-act between lean and circular construction seems evident. This research studies resource consumption in product-service systems (PSSs), which are acknowledged to reduce resource consumption. This research first assesses the ability of PSSs to slow and close the loops. After this, the research discusses the complementarities of circularity and lean to co-act toward the same goal. The multiple case studies demonstrate that PSSs have the potential to slow and close the loops. However, PSSs are not inherently circular, but each PSS needs to be designed to be circular system-by-system. Furthermore, the theoretical discussion encourages lean to co-act with circularity. The PSSs provide a system view to lean: to reduce current and future waste and to avoid value losses in multiple life cycles.","circularity; servitization; product-service system; building components","en","conference paper","IGLC (International Group for Lean Construction)","","","","","","","","","","Real Estate Management","","",""
"uuid:314b2346-7ee6-4f58-bc96-e49db6ea2c41","http://resolver.tudelft.nl/uuid:314b2346-7ee6-4f58-bc96-e49db6ea2c41","Towards implementation of circular building components: A longitudinal study on the stakeholder choices in the development of 8 circular building components","van Stijn, A. (TU Delft Real Estate Management; Amsterdam Institute for Advanced Metropolitan Solutions (AMS)); Wouterszoon Jansen, B. (Amsterdam Institute for Advanced Metropolitan Solutions (AMS)); Gruis, V.H. (TU Delft Real Estate Management); van Bortel, G.A. (TU Delft Real Estate Management)","","2023","Implementing circular building components can contribute to the transition to a circular economy. There are many possible circular design options for building components. Knowledge on which options are feasible to implement remains limited. Existing feasibility studies do not compare multiple circular design options, building components and/or are based on interviews rather than observation. They list barriers but do not identify their relative importance throughout a development process. In this article we present a longitudinal study on stakeholder choices in 5 development processes of 8 circular building components. The researchers co-created with stakeholders from initiative up to market implementation. Through process reflection and analysis, we identified choices which influenced the perceived feasibility of circular design options within different building components throughout their development. We found that circular design options perceived as feasible vary between different building components. Specific applications and context influence their feasibility. Moreover, perceived feasibility changes throughout the development process.","Barriers; Building components; Circular design; Circular economy (CE); Co-creation; Feasibility","en","journal article","","","","","","","","","","","Real Estate Management","","",""
"uuid:0d88bf41-245a-4ad9-9839-74d2c61037b3","http://resolver.tudelft.nl/uuid:0d88bf41-245a-4ad9-9839-74d2c61037b3","Cooking Up a Circular Kitchen: A Longitudinal Study of Stakeholder Choices in the Development of a Circular Building Component","Jansen, B. (TU Delft Real Estate Management; Amsterdam Institute for Advanced Metropolitan Solutions (AMS)); van Stijn, A. (TU Delft Real Estate Management); Gruis, V.H. (TU Delft Real Estate Management); van Bortel, G.A. (TU Delft Real Estate Management)","","2022","The built environment can be made more circular by gradually replacing building components with more circular components during construction, renovation, or maintenance. However, many different design options can be seen as circular. Although there is a growing number of studies about circular design options, research on what makes these options feasible or not feasible in practice is limited. This type of research requires intensive, long-term involvement with practitioners. Therefore, this article presents a longitudinal case study of an exemplary circular building component: the circular kitchen. The researchers actively engaged in a co-creation with industry partners to develop a circular kitchen design, supply chain model, and business model. All the choices made from initiative to market implementation were documented. Five lessons were drawn from an analysis of the stakeholder choices that can aid the future development of feasible circular building components: about ambition, aesthetics, design scale, participation, and focus.","circular economy; circular design; building components; kitchen; circular kitchen; kitchen design; co-creation; case study","en","journal article","","","","","","","","","","","Real Estate Management","","",""
"uuid:7e19cdf1-9c3b-46ff-ba52-539386b15c41","http://resolver.tudelft.nl/uuid:7e19cdf1-9c3b-46ff-ba52-539386b15c41","The technical or biological loop? Economic and environmental performance of circular building components","Jansen, B. (TU Delft Real Estate Management; Amsterdam Institute for Advanced Metropolitan Solutions (AMS)); van Stijn, A. (TU Delft Real Estate Management; Amsterdam Institute for Advanced Metropolitan Solutions (AMS)); Eberhardt, Leonora Charlotte Malabi (Aalborg University); van Bortel, G.A. (TU Delft Real Estate Management); Gruis, V.H. (TU Delft Real Estate Management)","","2022","The construction sector can become more sustainable by applying the Circular Economy concept, which distinguishes two main pathways: substituting materials for biological materials, or optimizing the use or reuse of technical materials. Practitioners sometimes choose one pathway over the other, but knowledge of which of these pathways yields the best circular performance for the building industry is lacking. To determine which pathway is the most circular, the performance of biological, technical, and hybrid variants for a circular kitchen and renovation façade are developed and compared with one another and with the linear ‘business-as-usual’ (BAU) practice components. The novel methods of Circular Economy Life Cycle Assessment (CE-LCA) and Circular Economy Life Cycle Costing (CE-LCC), and traditional material flow analysis (MFA) are used. The results show that the biological kitchen and façade consistently perform best in the CE-LCA, but perform second best and worst in the MFA respectively, and consistently perform the worst in the CE-LCC. Technical solutions perform best in the MFA. However, while the technical kitchen performs second best in the CE-LCA and best in the CE-LCC, the technical façade performs worst in the CE-LCA and third best in the CE-LCC. A purposeful, reversible, hybrid application of biological and technical materials yields the most consistent circular performance overall, performing best in the CE-LCC (saving 17 % compared to BAU), second best in the MFA (saving 23 % compared to BAU), and third best in the CE-LCA (an increase of 21 % compared to the BAU). This study shows that neither a purely biological nor purely technical solution performs best overall, but that a purposeful hybrid solution can mitigate the disadvantages of both pathways. Further research is recommended to assess more building components and other hybrid variants.","Building components; Circular design strategies; Circular economy; Circular pathways; Life cycle assessment; Life cycle costing","en","journal article","","","","","","","","","","","Real Estate Management","","",""
"uuid:3cf37ecf-958d-4794-b60f-8768fde795ff","http://resolver.tudelft.nl/uuid:3cf37ecf-958d-4794-b60f-8768fde795ff","Is er ruimte voor wonen?: Reactie op het Ruimte voor Wonen-rapport","Elsinga, M.G. (TU Delft Housing Institutions & Governance); Oorschot, L.M. (TU Delft Housing Institutions & Governance); van Bortel, G.A. (TU Delft Housing Management); Jonkman, Arend (TU Delft Housing Institutions & Governance)","","2020","Het in april 2020 verschenen rapport Ruimte voor Wonen (RvW) maakt deel uit van de Brede Maatschappelijke Heroverwegingen van kabinet Rutte III. Over de volle breedte van de collectieve sector zijn zestien maatschappelijke opgaven geïdentificeerd, waarvoor implicaties van diverse beleidsopties in kaart worden gebracht. Het uiteindelijke doel is om in de toekomst onderbouwde keuzes mogelijk te maken door inzicht te verschaffen in effectieve beleids- en uitvoeringsopties en de mogelijke gevolgen daarvan. Het is goed nieuws dat er een rapport ligt met een weloverwogen analyse van de huidige problemen en opties voor de toekomst. Op 17 maart 2021 vinden Tweede Kamerverkiezingen plaats. Wonen staat hoog op de politieke agenda en speelt straks vermoedelijk een belangrijke rol in de formatie. Het RvW-rapport biedt een basis voor geïnformeerde beleidsvorming, maar die basis is helaas nog onvolledig.
Het 1M Homes-initiatief van de Faculteit Bouwkunde van de TU Delft wil een bijdrage leveren aan een visie op de toekomstige woonopgave. Allereerst door te reageren op de diagnose en de opties voor de toekomst uit het RvW-rapport. De kern van dit commentaar is dat RvW een redelijk gefocust, maar beperkt, perspectief biedt. Het is volgens ons van groot belang voor de lange termijn om die blik te verbreden: het gaat niet alleen om nieuwbouw, maar zeker ook over aanpassing van de bestaande woningvoorraad, de verdeling van de bestaande woonruimte, de kwaliteit van de woonomgeving en bredere welvaartseffecten van verstedelijking.