Syfte: Byggsektorn karaktäriseras av att till stor del bestå av temporära projektorganisationer med mycket samarbete mellan discipliner men utan någon vidare processkontinuitet mellan de unika projekten. Det finns ett stort fokus på tid och omedelbar handling som en del av aktörernas referensram och varje aktivitet och nytt arbetssätt bör ge omedelbara fördelar i form av tidsvinster och effektivare utförande för att villigt accepteras. Behoven av standardiserade arbetssätt blir mycket synliga när man börjar införa BIM i projekten. Att aktivt använda BIM-modellen på bygget skapar krav på innehållet och att man följer ett projekteringsschema. BuildingSMART International (2010) skriver: ”Om den nödvändiga informationen är tillgänglig när den behövs och kvalitén på informationen är tillfredställande, så blir själva byggprocessen signifikant förbättrad”. Målet med detta examensarbete är att ta fram ett förslag på hur sekvensen av informationsleveranser bör se ut för den inledande produktionen av bärande system i en totalentreprenad. Metod: För att nå målet har en litteraturstudie genomförts för att skapa arbetets teoretiska ramverk. En fallstudie på en totalentreprenad med djupgrundläggning har genomförts. I fallstudien har empiri insamlats genom intervjuer med några av projektets aktörer samt en dokumentanalys av relevanta ritningar, protokoll och övriga dokument i projektet. Resultat: Rapporten har kartlagt sekvensen av informationsleveranser (inklusive vilket informationsinnehåll och vilken detaljeringsnivå de behöver ha) för den inledande produktionen av bärande system i en totalentreprenad. Detta kunskapsbidrag med processkarta och informationsbehov kan byggas vidare på, för att kunna implementeras i BIM-verktygen och därigenom underlätta arbetet och föra BIM-användningen framåt. Konsekvenser: Rapporten har med ovan resultat bidragit med några påbörjade pusselbitar i ett stort pussel av information och leveranser i rätt sekvens och detaljeringsgrad. För att pusslet ska bli komplett måste även informationsleveranser från förfrågningsunderlaget fungera korrekt. Arbetet har belyst fördelar att arbeta med BIM i denna del av byggprocessen. Rapporten föreslår förtydligande av innebörd genom att ha både detaljeringsnivå och utvecklingsnivå som benämningar i Sverige. Begränsningar: Rapporten begränsas till att beskriva vad byggentreprenören behöver för informationsleveranser från konstruktören som rör pålning, grundsulor och fundament. Rapporten beskriver också de informationsleveranser konstruktören behöver för att uppfylla byggentreprenörens informationsbehov. / Purpose: The building industry is characterised by mainly consisting of temporary project organizations with much interdisciplinary cooperation but with little continuity of process between the unique projects. There is a big focus on time and immediate action as part of the actors’ frame of reference, and every activity and new work method should give immediate advantages in time savings and more efficient work to be readily accepted. The need for standardised work methods is very visible when BIM is introduced in the projects. To actively use the BIM-model on site creates demands on the content and that a design schedule is followed. BuildingSMART International (2010) writes: ”If the information required is available when it is needed and the quality of information is satisfactory, the construction process will itself be significantly improved”. The aim of this work is to produce a suggestion of how the sequence of information deliveries should be in the starting production of the loadbearing system in a design build project. Method: To reach the aim a literature study has been conducted to create the theoretical framework for the study. A case study has been conducted on a design build project with a deep foundation. Empirical data has been collected by means of interviewing some of the project actors and conducting a document analysis of project documents such as drawings and protocols. Findings: The report has mapped the sequence of information deliveries (including what information content and what level of development they need to have) for the initial production of the loadbearing system in a design build project. This contribution of knowledge with the process map and information demands can be built upon, to allow for implementation in the BIM tools and thus make the work easier and push the use of BIM forward. Implications: With the above results the report has contributed with a few started puzzle pieces in a big puzzle of information and deliveries in the correct sequence and level of development. To complete the puzzle the information deliveries from the specifications also needs to work correctly. The report has shown advantages by working with BIM in this part of the building process. The report suggests clarification of meaning by using both names, level of detail and level of development, in Sweden. Limitations: The report is limited to describe what information deliveries the contractor needs from the structural designer when it comes to piling and foundations. It also describes the information deliveries needed by the structural designer to be able to meet the information need of the contractor.

Introduction – The building industry is evolving, this urges for innovative methodologies to facilitate the construction processes including the information exchanges between these to accomplish a sustainable future. In addition, new requirements are being set by the Swedish government and other national authorities with the objective of reducing the climate impact caused by the construction industry, which is responsible for a large amount of carbon dioxide emissions. A helpful tool to estimate the total carbon dioxide emission value is the Life Cycle Analysis (LCA) which depends on the Information Exchanges (IE) and the Level of Development (LOD) in BIM (Building Information Modelling) based projects to achieve a reliable result. Therefore, this research aims to find a better understanding of the relation between LOD, IE and LCA in BIM-based projects. Method – This research is based on an authentic ongoing construction project (casestudy), an assembled theoretical framework based on knowledge of the different subjects: LOD, BIM, LCA and IEs. And how previous researchers have faced similar issues. Also, on various thorough document analysis (BIM model and EIs) obtained from the case study. The mentioned above forms a support basis for this paper. Results – Two different BIM models were used to perform two LCA-simulations. One formed with LOD 200 provided a generic presentation of the studied element, which in this case was the model’s exterior walls. While the other model with LOD 300 generated a complex presentation of the model’s exterior walls. The simulation generated a comparative data showing that the Low LOD model had a climate impact value of 248 000 kg CO2. On the other hand, the High LOD model generated a climate impact value of 137 850 kg CO2, resulting in a 45% difference. The results presents that a lower carbon dioxide emission was caused when utilizing a higher LOD which contains more complex and specific information. The results argue for that a BIM model with the adequate amount of LOD is crucial for obtaining more reliable results when performing an LCA. Analysis – The results obtained from the LCA-simulations enhance the theories about the importance of LOD when performing an LCA. Higher LOD in a model generates more reliable results. Moreover, using a BIM software and an LCA plugin as tools facilitate the various IEs in a project. Discussion – The approach was limited to explore the environmental impact of one construction element, exterior walls, and its different LOD. Also, only the stage A1-A3 was analysed. However, trustworthy results were obtained due to the use of reliable data and research methods.