Les modèles énergétiques des bâtiments à l’échelle du quartier sont généralement simplifiés pour faire face au manque de données et pour réduire le coût de calcul. Cependant, l’impact de ces simplifications sur la validité des modèles n’est pas systématiquement analysée, en particulier lorsqu’on s’intéresse à la courbe de charge. Pour combler ce manque, une méthodologie permettant de quantifier la validité des simplifications, notamment vis-à-vis de la courbe de charge, est proposée. Cette méthodologie est appliquée aux simplifications couramment utilisée pour les modèles thermiques d’enveloppe de bâtiments grâce à une plateforme numérique développée dans le cadre de cette thèse. Cette plateforme permet de générer et simuler automatiquement des modèles énergétiques de bâtiments, avec différents niveaux de détails, à partir de données issues de systèmes d’information géographique. La parallélisation des simulations énergétiques des bâtiments est utilisée à l’échelle du quartier, afin de tirer avantage de la structure du modèle global et de réduire les temps de calculs. La définition d’indicateurs spécifiques selon l’objectif de simulation apparait clairement comme l’étape essentielle lorsque l’on s’intéresse à la courbe de charge. Les résultats indiquent que la puissance est plus sensible aux simplifications que la consommation annuelle d’énergie. Les différents effets induits sont quantifiés et analysés physiquement. La capacité de l’échelle du quartier à atténuer les impacts des simplifications et d’intégrer les données statistiques est démontrée. La quantification des impacts des simplifications permet de guider l’adaptation des modèles vis-à-vis des objectifs de simulation et vis-à-vis des contraintes techniques. Cette contribution a pour objectif d’améliorer la performance des simulations énergétiques à l’échelle de la ville, et de favoriser leur développement, afin de répondre aux enjeux futurs. / District-scale building energy models are generally simplified to cope with a lack of data and to reduce computational cost. However, the impacts of these simplifications on model accuracy are not systematically studied, particularly when considering power demand. The present manuscript introduces a methodology to determine the suitability of any simplifications, notably those at the district scale, and considering the power demand. This methodology was applied to usual simplifications of the building envelope model thanks to a specific platform developed in the frame of this thesis. This platform enables automatically generating and simulating building energy models with different modelling levels of detail from geographical information systems. The parallelisation of the building energy simulations was notably implemented at the district scale in order to benefit from the model structure and to efficiently reduce the computational duration. The definition of indicators related to specific simulation objectives appears to be a necessary step when focusing on power demand. The results show a higher sensitivity to simplifications of the power demand than the annual energy consumption. These effects are quantified and physically analysed. The district-scale ability to attenuate the impacts of simplifications and to integrate statistical sources of data were demonstrated. The resulting quantification of the impacts of the simplifications made it possible to guide the adaptations of models to the simulation objectives and to the technical constraints. Such contribution aims to increase the efficiency and to favour the development of city-scale energy simulations, which are particularly needed to cope with future challenges.

<p>Housing construction very close to the lake Mälaren has become very popular today. One potential problem with these houses is the influence of the sea climate. Unprotected buildings are affected by strong winds and precipitation. So for that reason, it is very important to make an accurate climate investigation and use it for decision-making during the planning of the new settlement.</p><p>It is very important with a good moisture protection regarding pelting rain, that is the combination of wind and rain. This is more important for buildings close to a lake, as this location normally means a higher exposure to wind. The location of the main bodies of the houses has an effect on the wind force between the houses. Some house parts are affected more than other, for instance curtain walls, bays, balconies and so on. These are problematic because of water and moisture that are moving in into joints and cavities in connections.</p><p>Bigger efforts than climate investigations are needed to get rid of the moisture problem.</p><p>The different actors that are involved in the construction project need to cooperate and focus on potential moisture problems during the complete construction process, not only during the production phase. It is also important that the construction workers have the knowledge on how to construct buildings that are moisture safe in practice.</p><p>According to investigations made, it appears that many of the moisture damages in buildings originate from the production phase because of incorrect construction components that are moisture-sensitive. But approximately 50% of the moisture problems derive from the planning process. The reasons are mainly lack of easily available tools, (for instance descriptions of moisture protection), insufficient knowledge, lack of time and lack of interest. These early mistakes results in later problems during the production phase. It is of great importance that the project members have good communication with the building contractors. They need to inform them on how to calculate dry times for different construction components and what type of inspections that shall be performed.</p>

Housing construction very close to the lake Mälaren has become very popular today. One potential problem with these houses is the influence of the sea climate. Unprotected buildings are affected by strong winds and precipitation. So for that reason, it is very important to make an accurate climate investigation and use it for decision-making during the planning of the new settlement. It is very important with a good moisture protection regarding pelting rain, that is the combination of wind and rain. This is more important for buildings close to a lake, as this location normally means a higher exposure to wind. The location of the main bodies of the houses has an effect on the wind force between the houses. Some house parts are affected more than other, for instance curtain walls, bays, balconies and so on. These are problematic because of water and moisture that are moving in into joints and cavities in connections. Bigger efforts than climate investigations are needed to get rid of the moisture problem. The different actors that are involved in the construction project need to cooperate and focus on potential moisture problems during the complete construction process, not only during the production phase. It is also important that the construction workers have the knowledge on how to construct buildings that are moisture safe in practice. According to investigations made, it appears that many of the moisture damages in buildings originate from the production phase because of incorrect construction components that are moisture-sensitive. But approximately 50% of the moisture problems derive from the planning process. The reasons are mainly lack of easily available tools, (for instance descriptions of moisture protection), insufficient knowledge, lack of time and lack of interest. These early mistakes results in later problems during the production phase. It is of great importance that the project members have good communication with the building contractors. They need to inform them on how to calculate dry times for different construction components and what type of inspections that shall be performed.

In 1996, the artillery regiment, A4, in Östersund was disbanded. Their former premises underwent remodelling to serve as the new campus for the Mid Sweden University. The express intention was that the new occupiers would be allowed to take part in the planning process. During 1997 the company Vasallen became the owner of the premises, by direction of the Ministry of Finance. Vasallen was charged with the management of former military premises and increasing their value with the aim of selling the property. Thanks to their well-defined mission and good financial resources, Vasallen became a new actor on the property market. In the same year, a number of architectural firms were invited to take part in a competition. At the beginning of 1998, SWECO FFNS was chosen as the winner, and the planning process started immediately. The new campus was inaugurated on September 6, 2002 with the Swedish Prime Minister, Göran Persson, in attendance. The aim of this study was to monitor how well the demands of the new occupiers regarding quality and environment were met, and how these demands were managed during the construction process. My ambition was to study the process as a case study in order to better understand and reflect on what actually happens in the communication between partners. The material on which the study is based was gathered by participation in planning meetings and by following the construction process. The Campus Östersund project was unique in many ways. In the first place, the existing buildings form a sound basis as they were intentionally designed with the needs and well-being of the individual in mind. Many qualities were thus already incorporated into the buildings on the site. The strict regulations imposed by the fact that these were classed as historical buildings set certain limitations, while at the same time posing a challenge to be overcome. The stark contrast between a military regiment and the activities of a modern university placed high demands on those involved in the project. The user’s wishes and demands, working environment factors, structural issues and demands on comfort always have a tendency to take second place after financial factors. In this case, however, the owner’s and user’s joint ambition led to the reconsideration of priorities concerning, for example, the working environment. Finally, the project was unique as a fully comprehensive view of the process and final product was adopted by the two main partners. This includes, for example, observing environmental assets throughout the whole project. In 1996, the artillery regiment, A4, in Östersund was disbanded. Their former premises underwent remodelling to serve as the new campus for the Mid Sweden University. The express intention was that the new occupiers would be allowed to take part in the planning process. During 1997 the company Vasallen became the owner of the premises, by direction of the Ministry of Finance. Vasallen was charged with the management of former military premises and increasing their value with the aim of selling the property. Thanks to their well-defined mission and good financial resources, Vasallen became a new actor on the property market. In the same year, a number of architectural firms were invited to take part in a competition. At the beginning of 1998, SWECO FFNS was chosen as the winner, and the planning process started immediately. The new campus was inaugurated on September 6, 2002 with the Swedish Prime Minister, Göran Persson, in attendance. The aim of this study was to monitor how well the demands of the new occupiers regarding quality and environment were met, and how these demands were managed during the construction process. My ambition was to study the process as a case study in order to better understand and reflect on what actually happens in the communication between partners. The material on which the study is based was gathered by participation in planning meetings and by following the construction process. The Campus Östersund project was unique in many ways. In the first place, the existing buildings form a sound basis as they were intentionally designed with the needs and well-being of the individual in mind. Many qualities were thus already incorporated into the buildings on the site. The strict regulations imposed by the fact that these were classed as historical buildings set certain limitations, while at the same time posing a challenge to be overcome. The stark contrast between a military regiment and the activities of a modern university placed high demands on those involved in the project. The user’s wishes and demands, working environment factors, structural issues and demands on comfort always have a tendency to take second place after financial factors. In this case, however, the owner’s and user’s joint ambition led to the reconsideration of priorities concerning, for example, the working environment. Finally, the project was unique as a fully comprehensive view of the process and final product was adopted by the two main partners. This includes, for example, observing environmental assets throughout the whole project. Brukarmedverkan i byggprocessen –en fallstudie 12 Building the “right product” is an important argument for including the end user in the project. By initiating a planning process in which the user’s demands and wishes are considered, one not only initiates the actual building process, but also a process in the client’s organisation. The capacity to participate in such a process within the organisation is, however, not always good. Clarity and respect for the processes initiated were not always particularly pronounced in this case. Lack of clarity sometimes led to confusion, which in turn led to complications in communication and thus delay in the project. The internal process in an organisation should, if possible, progress simultaneously with, and be firmly established before, meetings with the consultants. Theoretical studies have confirmed the importance of utilizing the process of change in internal organisational development in order to achieve a positive attitude among employees. Participation of the end user in a large organisation is often based on representatives in working parties. These representatives should be motivated, be given the time required within the framework of their job, and have the confidence of their colleagues. The opportunity to influence decisions is great in the initial stages. The user should have knowledge concerning the various phases of construction, the financial and legal framework, and the rules and regulations governing the project. Being able to participate in creating one’s own working environment elicits various degrees of commitment and levels of expectation in the user organisation. Both the occupants and the consultants should have the capacity for this kind of development, especially the latter as they constitute the “front line”. The user should understand the relation between desires and possible financial effects. The price tag for alternative demands/wishes and the effects these will have on the final rent should be clearly visible. It is an advantage if this is made clear very early on in the project. The dialogue between the parties should thus be supplemented by the architect explaining to the new occupiers where limitations and opportunities lie in the project. The parties involved must have a certain degree of pedagogical competence in order to explain and manage the project to everyone’s satisfaction. A good environment is seldom described in terms of formulated concepts outside the architectural community. Projects in which the end user is involved thus provide a unique opportunity to start building up a bank of knowledge including expressions used by non-experts to describe concepts of space. Difficulties are encountered when all these views are to be accepted and implemented in the building process through descriptions and drawings. Words are replaced by numbers, and more and more actors are involved, for example, engineering consultants. We simply do not have all the necessary tools with which to express wishes concerning the physical environment. We can, however, bridge the communication gap between users and consultants by using computer-aided information systems. The ideas expressed by the user can be transformed into three-dimensional video sequences, and thus be confirmed as being, “just what we meant”. It was apparent quite early on in this research that the technical terms available were not adequate to describe the events of this case. The end user’s feeling of not being able to keep up with the consultants’ technical concepts may lead them to feel that they are at a disadvantage, which certainly will not benefit the process. Here, the role of the architect as a pedagogue is important in leading the various participants into the planning process. One of the actors should perhaps have some kind of skills in behavioural science and Brukarmedverkan i byggprocessen –en fallstudie education. Perhaps changes should be made in the training of architects and other consultants. Respect for the common process is perhaps the most important factor for its success, together with clarity and openness. These are terms not traditionally used in construction projects. The interpretation of the customer’s wishes, explaining the opportunities and limitations of the building, and planning for future expansion are the responsibility of the architect. Does a single actor have a reasonable chance of coping with this in a large-scale project? All the participants should gain broad insight into each other’s jobs and roles early on in the project. Respect for the responsibilities and roles of others can be built up by concentrated efforts to exchange knowledge through dialogue early in the process. The incentive for participating varies from one actor to another. Theoretical studies, for example, give clear advice that each actor’s interests in the project be clarified. Trust is one of the most important mainstays in establishing good communication. Feelings of suspicion and unreliability can be disastrous in this kind of project. The development of legal issues and forms concerning contractors and their work is also desirable in order to aid the process. When the owner sees the opportunity to take an active part in the management of the premises, this leads to a continuous dialogue and process during and after the planning and construction phases. These studies have given me a greater respect for processes involving the end user, from planning to management. One of my most important personal  reflections, and a partly new realisation, is that the involvement of the user in the process has such a large influence on the building project. Communication and continuous information are essential in projects in which the user is involved. Communication can also be made easier if the parties regard each other as fellow partners and not opposing partners. The period spent in education and training is the most important in laying the foundation for these attitudes among professionals. A great deal of responsibility thus lies with teachers to ensure that end users have increased opportunity to participate in and influence the building process. There is no short cut to customer-focused working methods.

Este trabalho de pesquisa tem como objeto central a questão do provimento da habitação social para a população do campo através de organizações coletivas, em projetos que buscam além da construção de casas. Para tanto, parte da análise de um projeto de grande complexidade, denominado Projeto Sepé Tiaraju - Construção das Casas , no qual foi experimentado um processo participativo, desde a escolha da habitação, a organização para a construção e a gestão das obras. Com o desenrolar das construções, no entanto, toda a organização idealizada inicialmente se perdeu, e foi substituída pelos mais variados conflitos, e por diversas paralisações de obra. Neste contexto, este trabalho tem como objetivo analisar a organização coletiva das famílias do assentamento rural Sepé Tiaraju, Serra Azul - SP, na construção de 67 habitações, partindo do pressuposto de que existiram diferentes racionalidades que influenciaram e interferiram na organização coletiva no processo de construção das habitações, as quais se referem às características das famílias que compuseram o grupo; à atuação da assessoria técnica; às características do programa de financiamento; e às características de um canteiro de obras em meio rural. A estratégia da pesquisa está baseada em duas metodologias, a pesquisa-ação e o estudo de caso, e se desenvolve a partir da descrição do histórico de construção das casas. A importância da pesquisa está em apontar as distorções decorrentes de projetos como este, os quais, esbarrando em interesses divergentes, e num programa habitacional rígido, acabam por promover processos bastante desgastantes para os todos os envolvidos, comprometendo os seus resultados esperados. / This search work has as its central object the provision of social housing to rural population across collective organizations, in projects that claim for re sults beyond housing construction. For both, it sets off from a complex project called \"Sepé Tiaraju Project - house building\", in which was experienced a participatory process, from the choice of the house, the organization to the construction, until the managements of the construction. With the progress of the constructions, however, the entire organization that was initially conceived was lost, and it was replaced by many conflicts and several work stoppages. In this context, this dissertation has as its objective to analyze the families\' collective organization of the rural settlement Sepé Tiaraju, Serra Azul - SP, in the process of building 67 houses. The search work has as its presupposition that different rationalities have influenced and interfered in the process building across the collective organization, which refer to the characteristics of families that composed the group; the performance of technical assistance; the characteristics of the financing program; and the characteristics of a construction site in rural areas. The research strategy is based on two methodologies, the \"action research\" and the \"case study research\", and it develops from the description of the historical house construction. The importance of the research is to point out the distortions arising from projects like this, which, running into conflicting interests, and a rigid housing program, ends up promoting a very stressful process for all involved, and affecting their results.

O emprego de processos construtivos inovadores sem o domínio da tecnologia apropriada e sem a observância de requisitos mínimos de desempenho, conduz de maneira geral, a edifícios com sérios problemas patológicos. Por estas razões, a Alvenaria Estrutural, que tem sido empregada com prioridade na construção de edifícios habitacionais, nos últimos anos no Brasil, tem apresentado aqueles problemas com indesejável extensão e gravidade. Este trabalho procura estabelecer a tecnologia mais adequada para a construção de edifícios em Alvenaria Estrutural Não Armada, em especial, para a que utiliza o bloco sílico-calcário. Procura-se também salientar os aspectos ainda não suficientemente conhecidos e que necessitam, por isto, ser pesquisados. São apresentadas as principais características dos materiais empregados. O elemento construtivo essencial do processo - a parede resistente - é sistemicamente analisado sob diferentes abordagens. Como complemento, a análise é extendida para o edifício. No estudo, é enfatizado o mais comum e menos compreendido problema patológico da alvenaria sílico-calcária: as fissuras por retração na secagem. A tecnologia construtiva apropriada é estritamente condicionada pela necessidade de que seja evitada a ocorrência destas fissuras. Em resumo, este trabalho objetiva colaborar para o projeto e a construção de edifícios competentes e duráveis, o que, infelizmente, não tem sido a regra, quando processos inovadores são empregados. / Pathological buildings problems certainly occur when innovative constructive processes are employed without knowing their own technology and without getting to minimum performance requirements. Based on these reasons, the engineered masonry which has been mainly employed on housing constructions in Brazil during the last years, shows up severs pathological problems. This study aims to describe the most appropriate known technology for unreinforced engineered brickworks, mainly for that one employing calcium silicate bricks. Therefore, the important parameters which are not yet suitably known are pointed out, thus requiring further research. The materials main characteristics are introduced. The bearing wall which is the most important constructing element is systemically analised under different approaches. Coming at the end the concepts are extended to the whole building itself. Emphasis is given in this study to drying shrinkage cracking as the most usual problem in calcium silicate brickworks and to its mechanisms not yet fully understood. The correct building technology avoids the cracking problems by using the mentioned materials and processes. Summarising , this study intends to cooperate for the correct and durable housing buildings which unfortunately are not usual nowadays when innovative constructive processes are applied.

Purpose: The purpose of this study is to create a plan of procedure for medium-sized construction companies that want to work with project development based on Swedish laws and regulations. The plan of procedure will document how these companies can start with ecologically sustainable housing projects in the initial stage of the construction process. The framing questions for the study is:  What legal requirements, regulations and general guidelines exist that relates to ecologically sustainable housing projects in Sweden?  What does the initial stage of the construction process look like and what processes and methodologies are used for housing projects?  How can a process for starting with ecologically sustainable housing projects based on the initial stage and its processes be designed and documented? Method: The research project contains a case study that used semi-structured interviews as well as a document study to answer the framing questions. The respondents come from three different companies and have been based on two different housing projects, which made it possible to create a generalizable result. Findings: The result of the study consists of a plan of procedure which includes processes, sub-processes, activities and decision points. The plan divides the activities into internal and external parties and is based on seven main topics that emerged during the document study. This plan of procedure can help support businesses that want to start new housing projects under project development. Implications: The study has given tools for business development to building dwellings as project development from Swedish regulations and legislations about ecological sustainability have been created and documented. A foundation, in form of a process map, to build upon for ecological sustainable dwelling project, for middlesized contractors has been created. Limitations: One limitation of the work is that many decisions to proceed with a project, the design and choice of installation system are based on financial aspects. Since the work has only focused on the ecological aspects, the economy has ended up outside the work, which means that when the results of the work are to be used, the economy must be weighed in separately. Decision-making is also not based solely on current legislation, which the work has focused on.

Building Information Modelling (BIM) medför ett helt nytt sätt att arbeta där objektsbaserade 3D-modeller är den huvudsakliga informationskällan. Modellerna kan bära på stora mängder information i jämförelse med den traditionella pappersritningen som är begränsad till text, symboler och en 2D-visualisering av byggnaden. Att arbeta med BIM ställer helt nya krav på hur information ska struktureras för att säkerställa att den tolkas på samma sätt av alla aktörer i ett projekt och all den programvara som används för att hantera informationen. Den här rapporten behandlar installationer specifikt och klassifikationen av byggdelar som är grunden för att identifiera objekt i en modell. Vi har utrett BSAB 96 som är ett väletablerat system för klassifikation av byggdelar men i sin nuvarande utformning täcker det inte behovet för att kunna användas i BIM. Detta är en nyckelfaktor för att kunna koppla rätt information till BIM-objekten så att en obruten informationskedja kan erhållas. Vi förklarar teorin bakom klassifikationssystem, BSAB 96 i synnerhet, och hur de appliceras på BIM. De problemområden och utvecklingsbehov som finns ringas in och i en fallstudie föreslås två konkreta förslag på utvidgning av byggdelstabellen för installationer i BSAB 96; ett för praktisk tillämpning idag och ett baserat på en fullt integrerad datoriserad process. / Building Information Modelling (BIM) represents a completely new way of working where object-based 3D models are the main source of information. The models can carry large amounts of information in comparison with the traditional paper drawing which is limited to text, symbols, and a 2D visualization of the building. Working with BIM creates new requirements on how information should be structured to ensure that it is interpreted in the same manner by all participants in a project and all the software that is being used to handle it. This report deals with HVAC especially and the classification of construction elements which is the basis for identifying objects in the model. We have investigated BSAB 96 which is a well-established system for classification of construction elements but in its current state it does not cover the needs for use in BIM. This is a key factor to be able to connect the right information to BIM objects. We explain the theory behind classification systems, BSAB 96 in particular, and how they are applied to BIM.  The problem areas and development needs are highlighted and in a case study two concrete suggestions are proposed for expanding the classification table for HVAC construction elements in BSAB 96; one for practical used today and one based on a fully integrated computerized process.

A construção industrializada se mostra como uma oportunidade para aperfeiçoar o processo de produção na construção civil, mas para sua efetiva aplicação é preciso estabelecer um processo de produção condizente com suas características. O objetivo desta pesquisa é analisar como cada uma das perspectivas da integração - contratual, organizacional e de tecnologia da informação - pode aperfeiçoar e ampliar o uso da construção industrializada. A integração do processo de produção é considerada como uma solução para aumentar a qualidade e produtividade na construção civil e suas características estão alinhados aos requisitos da industrialização, seja por meio do uso da pré-fabricação e/ou de técnicas de racionalização da construção. Na literatura afirma-se que, na construção em geral, só é possível alcançar a integração do processo com mudanças estruturais nas três perspectivas. Investigou-se, no caso da construção industrializada, se um alto nível de integração em uma ou duas dessas perspectivas pode compensar a menor ou a sua ausência em outra(s). Para tanto, criou-se um ordenamento do grau de integração relativo a cada perspectiva, pela análise em detalhe de suas características, com a ajuda de diagramas específicos. Também foi elaborada uma tabela geral, com as interdependências entre as três perspectivas dado a graduação em cada uma. Tal método serviu de base para a análise de cinco estudos de caso de construção industrializada. Observou-se que, características da integração organizacional são as que mais favorecem o uso da industrialização, estabelecendo uma visão sistêmica ao processo. É possível estabelecer o trabalho colaborativo sem que a integração esteja definida no modelo de contrato. A integração pela tecnologia da informação, especificamente por meio do BIM, ainda que não se tenha mostrado essencial, permite antecipar possíveis incompatibilidades entre os sistemas construtivos. / Industrialized construction is an opportunity to improve project delivery process; however, it is crucial to reorganize the methods of the process, for its successful use. The aim of this research is to analyze how each perspective of integration - contract, organization and information technology - can improve and expand the use of industrialized construction. Integration of the project process is assumed as a solution to increase quality and efficiency in construction and, its features are aligned with the requirements for industrialized construction, be it through prefabrication and/or rationalization of the construction. It has been stated that, for the general case in construction, its integration can only be achieved from structural changes in all three approaches. It was investigated if a high level of integration in one or two of these perspectives can compensate for lower or absent in the other(s). For that matter, an ordering of the relative degree of integration within each perspective, was derived from the analysis of their characteristics, through the use of specific diagrams. Also, a general table of the interdependencies among the three perspectives was built. This method was used to analyze five case studies of industrialized construction. It was realized that the features of organization integration are those that give better support to the use of industrialized construction. Also, that it is possible to achieve collaboration even when it is not ruled in the contracts. Integration by information technology, specifically through BIM, although not proved essential, allows for anticipation of possible incompatibilities between construction systems.

Syftet med denna rapport är att undersöka och analysera vad det finns för begränsningar och möjligheter med en industriell byggprocess där det byggs med moduler. Den syftar även till att undersöka relationerna mellan en projektör, entreprenör och leverantör i en industriell byggförsörjningskedja och hur dessa relationer kan utvecklas.I dagens Sverige är bostäder ett stort problem då det inte finns tillräckligt för att täcka dagens behov. För att bemöta detta behov har det blivit allt mer vanligt med en industriell byggprocess där stora delar av byggnaden tillverkas som moduler i fabrik. Med modul menas en del eller komponent av ett byggnadsverk som tillsammans med andra moduler går att montera ihop till en byggnad. Inom industriellt byggande benämns utformningen av moduler som en begränsning. I och med att aktörer behöver följa regler gällande mått blir det mindre möjligheter för att ha större öppna ytor i bostaden. Det behövs också en viss standardisering i produktionen vilket leder till mindre flexibilitet och eventuellt inte lika god estetik som ett traditionellt bygge. Det är därför viktigt för aktörerna att hitta den typ av kund och marknad som är mest lämplig för modulbyggnation. Vid montering av moduler på byggarbetsplatsen kan det uppstå problem, särskilt gällande gränssnittet. Det är därför viktigt att denna del har någon form av standardisering samt att alla inblandade aktörer får ta del av projekteringen och påverka modulen i tidigt skede. På så sätt kan det bli mindre risk för att fel uppstår längre fram i processen. Vid en industriell byggprocess skapas möjligheten till att göra stora effektiviseringar och optimeringar i produktionen. Av den anledning är det nödvändigt att tillämpa någon typ av förbättringsarbete så som exempelvis Lean och Plan-Do-Check-Act-cykeln. Dock bör det beaktas att alla verktyg inte passar alla verksamheter och av den anledningen bör varje verktyg optimeras för den specifika verksamheten som det ska tillämpas i. För effektiviseringar i en industriell byggprocess är Byggnadsinformationsmodellering (BIM) ett bra verktyg som går att tillämpa. Med hjälp av BIM kan inblandade aktörer ta del av samma digitala modell från tidigt skede i projekteringen till förvaltningen. Då alla aktörer tar del av samma information skapas det bättre relationer och mindre missuppfattningar. / The purpose of this report is to investigate and analyze what constraints and opportunities that exist within an industrial building process based on modules. It also aims to investigating the relationships between a projector, contractor and supplier in an industrial building supply chain and how these can be developed. In Sweden today, housing is a major problem as there is not enough houses to meet the people’s need. To meet this need, it has become increasingly common with an industrial housing process, where large parts of the building are manufactured as modules in a factory. Module is described as a component of a building that together with other modules can be assembled to a complete building. Within an industrial building process, the design of the modules is referred as a limitation. As the actors need to follow the rules regarding measurements, there will be fewer opportunities for having larger open spaces in the buildings. There is also a need for some standardization in the production process, which leads to less flexibility and possibly not as good aesthetics as a traditional building; therefore it is important to focus on what kind of customer and market that is the most suitable for modular construction. When assembling modules at a construction site problems may occur, especially regarding the interface. It is therefore important that the process has some kind of standardization and that all involved actors may participate and influence the module at the early stages of the building process. If this is executed in a good way the risk of errors in the building process is reduced. In an industrial building process, the possibility of making major optimizations and efficiency improvements is created. For this reason, it is necessary to apply some kind of improvement work, such as Lean and the Plan-Do-Check-Act-Cycle. Thus, it should be borne in mind that all tools do not suit all activities, and for this reason each tool should be optimized for the specific activity. For efficiency improvements in an industrial building process, Building Information Model (BIM) is a good tool that can be applied. When using BIM, different actors can share the same digital model from the early stages of design to management of the building. When all actors share the same information, better relationships and fewer misconceptions are created.