With the growing demand and use of BIM modeling, there’s also a growing number of competitors. Since every provider of BIM software has their own specific functions and file formats, there is no standard common platform and compatibility issues occur when projects are transferred between each other. Focus for this thesis is this gap and what can be done from preventing the gap to expand even more, this will be done by having a look at the most promising solutions that exists today.  If a way to prevent this from happening is discovered, this will be documented in the report and if possible, a program will be developed that can be used by anyone in order for the programs to communicate with each other in a better way.

Building energy efficiency is progressively becoming a crucial topic in the architecture, engineering, and construction (AEC) sector. Energy management tools have been developed to promise appropriate energy savings. Building energy simulation (BES) is a tool mainly used to analyze and compare the energy consumption of various design/operation scenarios, while building automation systems (BAS) works as another energy management tool to monitor, measure and collect operational data, all in an effort to optimize energy consumption. By integrating the energy simulated data and actual operational data, the accuracy of a building energy model can be increased while the calibrated energy model can be applied as a benchmark for guiding the operational strategies. This research predicted that building information modeling (BIM) would link BES and BAS by acting as a visual model and a database throughout the lifecycle of a building. The intent of the research was to use BIM to document energy-related information and to allow its exchange between BES and BAS. Thus, the energy-related data exchange process would be simplified, and the productive efficiency of facility management processes would increase. A systematic literature review has been conducted in investigating the most popular used data formats and data exchange methods for the integration of BIM/BES and BAS, the results showed the industry foundation classes (IFC) was the most common choice for BIM tools mainly and database is a key solution for managing huge actual operational datasets, which was a reference for the next step in research. Then a BIM-based framework was proposed to supporting the data exchange process among BIM/BES/BAS. 4 modules including BIM Module, Operational Data Module, Energy Simulation Module and Analysis and Visualization Module with an interface were designed in the framework to document energy-related information and to allow its exchange between BES and BAS. A prototype of the framework was developed as a platform and a case study of an entire office suite was conducted using the platform to validate this framework. The results showed that the proposed framework enables automated or semi-automated multiple-model development and data analytics processes. In addition, the research explored how BIM can enhance the application of energy modeling during building operation processes as a means to improve overall energy performance and facility management productivity. / Doctor of Philosophy / Building energy efficiency is progressively becoming a crucial topic in the architecture, engineering, and construction (AEC) sector, promising appropriate energy savings can be achieved over the life cycle of buildings through proper design, construction, and operation. Energy management tools have been developed towards this end. Building energy simulation (BES) is a tool mainly used to analyze and compare the energy consumption of various design/operation scenarios. These instances include the selection of both new and retrofit designs and for building codes, building commissioning, and real-time optimal control, among others. The main challenge surrounding BES is the discrepancy between quantitative results and actual performance data. Building automation systems (BAS), or a part of BAS which is often referred to as building energy management systems (BEMS), works as another energy management tool to monitor, measure and collect operational data, all in an effort to optimize energy consumption. The key disadvantage to the more general tool of BAS in energy management is that the data sets collected by BAS are typically too large to be analyzed effectively. One potential solution to the lack of effective energy management analysis may lie in the integration of BES and BAS. Actual operational data can be compared with simulation results in assessing the accuracy of an energy model while the energy model can be applied as a benchmark for evaluating the actual energy consumption and optimizing control strategies. The presented research predicted that building information modeling (BIM) would link BES and BAS by acting as a visual model and a database throughout the lifecycle of a building. The intent of the research was to use BIM to document energy-related information and to allow its exchange between BES and BAS. Thus, the energy-related data exchange process would be simplified, and the productive efficiency of facility management processes would increase. More specifically, this research posits the framework of integrating BIM, BES, and BAS to produce a seamless and real-time energy-related information exchange system. The proposed framework enables automated or semi-automated multiple-model development and data analytics processes. In addition, the research explored how BIM can enhance the application of energy modeling during building operation processes as a means to improve overall energy performance and facility management productivity.

<p>For nearly twenty years people have been talking about Product models, but given that the building industry is so conservative, it is hard to implement new working methods. Product models are these days known as Building Information Modeling, BIM. People often say they work with BIM but they often forget the most important part, the information. A 3D model should be linked with characteristics and information. Information that can be invaluable for the facility manager.</p><p>We have a vision that in the best of worlds the facility manager would be able to "walk" into the model and see what kind of installations are inside the wall or in the roof. You should be able to point at an object and gain complete information about operation and maintenance off the installation. You should also be able to gain information such as the name of the product and article number if you have to buy a new one. That’s why in our thesis we want to highlight the possibilities for the facility manager.</p><p>In order to have high achievements with BIM, coordination is highly needed. All participants in the construction process have to work together at an early stage; they must have the possibility to affect the stage of inquiry. By having the facility manager connected to the process at an early stage, other members have the opportunity to understand what’s expected from them. In the same way the facility manager will understand if any of the requirements are unreasonable or difficult to solve. Planning must be allowed to cost money. A well planned project can later save a lot of money due to less problems at the building worksite. In a well planned project there will be less changes and less additional work. The key words are Coordination and review.</p><p>During the facility management stage there are great opportunities to save money with BIM. The benefits of BIM have been shown and larger facility companies demand a model that work in the facility management stage. The greatest advantages are gained by the visual model that gives a greater understanding and a better base for decisions. There are also great advantages in more effective processes, better quality and better documentation for maintenance, operation, future rebuilding and future sale.</p><p>To be able to get a good image of BIM, how it is used today and what expectations there are, we have interviewed facility managers, system manager and BIM experts. We have also researched information in reports and articles.</p> / <p>I snart 20 år har man pratat om Produktmodeller men i byggbranschen är det svårt att införa nya arbetsmetoder. Produktmodeller har senare fått namnet Building Information Modeling eller Byggnadsinformationsmodeller på svenska, fortsättningsvis kallat BIM. Många säger idag att de BIM:ar när de gör 3D modeller men de glömmer ofta den viktigaste delen, informationen. Till 3D modellen kan egenskaper och information kopplas till varje objekt. Information som sedan kan vara ovärderlig för förvaltaren.</p><p>Vi har en vision av att i de bästa av världar skall förvaltaren kunna ”gå” in i modellen och se vad för installationer som finns i t.ex. väggar och ovanför takplattor. Dessutom ska man bara kunna peka på  ett don och få all information om det vad gäller drift och underhåll samt produktnamn och artikelnummer för att köpa ett nytt. Därför försöker vi i examensarbetet lyfta fram förvaltaren och fördelarna för denne.</p><p>För att få ut det bästa med BIM krävs samordning. De olika aktörerna i processen måste börja arbeta tillsammans i ett tidigt stadium, d.v.s. vara med och påverka redan i utredningsstadiet. Kan man ha med förvaltningen redan i utredningen får övriga aktörer en bättre förståelse för vad som förväntas av dem. Samtidigt kan förvaltningen tidigt få veta om några krav är orimliga eller svårlösta.Projektering måste få kosta. Ett väl projekterat projekt kan senare spara massor med pengar på att inga problem behöver lösas på byggarbetsplatsen. I väl projekterade projekt minskar ÄTA-arbeten och kollisioner. Nyckelorden för detta är Samordning och Samgranskning.</p><p>I förvaltningsskedet finns det stora utsikter att spara kostnader med hjälp av BIM, fördelarna har börjat visa sig och en del större förvaltare har börjat ställa krav på en produktmodell som går vidare in i förvaltningsskedet. De största fördelarna är bl.a. visualiseringen som ger en bättre förståelse och ett bättre underlag för beslut, effektiviseringen som spar både tid och material, kvalitetshöjning och bättre dokumentation för underhåll, drift, uthyrning, framtida ombyggnad och framtida försäljning.</p><p>För att skapa oss en bild om BIM, hur det används idag och vilka förväntningar som finns branschen, har vi intervjuat förvaltare, systemansvariga och BIM-experter. Vi har även sökt information i rapporter och tidsskrifter.</p>

For nearly twenty years people have been talking about Product models, but given that the building industry is so conservative, it is hard to implement new working methods. Product models are these days known as Building Information Modeling, BIM. People often say they work with BIM but they often forget the most important part, the information. A 3D model should be linked with characteristics and information. Information that can be invaluable for the facility manager. We have a vision that in the best of worlds the facility manager would be able to "walk" into the model and see what kind of installations are inside the wall or in the roof. You should be able to point at an object and gain complete information about operation and maintenance off the installation. You should also be able to gain information such as the name of the product and article number if you have to buy a new one. That’s why in our thesis we want to highlight the possibilities for the facility manager. In order to have high achievements with BIM, coordination is highly needed. All participants in the construction process have to work together at an early stage; they must have the possibility to affect the stage of inquiry. By having the facility manager connected to the process at an early stage, other members have the opportunity to understand what’s expected from them. In the same way the facility manager will understand if any of the requirements are unreasonable or difficult to solve. Planning must be allowed to cost money. A well planned project can later save a lot of money due to less problems at the building worksite. In a well planned project there will be less changes and less additional work. The key words are Coordination and review. During the facility management stage there are great opportunities to save money with BIM. The benefits of BIM have been shown and larger facility companies demand a model that work in the facility management stage. The greatest advantages are gained by the visual model that gives a greater understanding and a better base for decisions. There are also great advantages in more effective processes, better quality and better documentation for maintenance, operation, future rebuilding and future sale. To be able to get a good image of BIM, how it is used today and what expectations there are, we have interviewed facility managers, system manager and BIM experts. We have also researched information in reports and articles. / I snart 20 år har man pratat om Produktmodeller men i byggbranschen är det svårt att införa nya arbetsmetoder. Produktmodeller har senare fått namnet Building Information Modeling eller Byggnadsinformationsmodeller på svenska, fortsättningsvis kallat BIM. Många säger idag att de BIM:ar när de gör 3D modeller men de glömmer ofta den viktigaste delen, informationen. Till 3D modellen kan egenskaper och information kopplas till varje objekt. Information som sedan kan vara ovärderlig för förvaltaren. Vi har en vision av att i de bästa av världar skall förvaltaren kunna ”gå” in i modellen och se vad för installationer som finns i t.ex. väggar och ovanför takplattor. Dessutom ska man bara kunna peka på  ett don och få all information om det vad gäller drift och underhåll samt produktnamn och artikelnummer för att köpa ett nytt. Därför försöker vi i examensarbetet lyfta fram förvaltaren och fördelarna för denne. För att få ut det bästa med BIM krävs samordning. De olika aktörerna i processen måste börja arbeta tillsammans i ett tidigt stadium, d.v.s. vara med och påverka redan i utredningsstadiet. Kan man ha med förvaltningen redan i utredningen får övriga aktörer en bättre förståelse för vad som förväntas av dem. Samtidigt kan förvaltningen tidigt få veta om några krav är orimliga eller svårlösta.Projektering måste få kosta. Ett väl projekterat projekt kan senare spara massor med pengar på att inga problem behöver lösas på byggarbetsplatsen. I väl projekterade projekt minskar ÄTA-arbeten och kollisioner. Nyckelorden för detta är Samordning och Samgranskning. I förvaltningsskedet finns det stora utsikter att spara kostnader med hjälp av BIM, fördelarna har börjat visa sig och en del större förvaltare har börjat ställa krav på en produktmodell som går vidare in i förvaltningsskedet. De största fördelarna är bl.a. visualiseringen som ger en bättre förståelse och ett bättre underlag för beslut, effektiviseringen som spar både tid och material, kvalitetshöjning och bättre dokumentation för underhåll, drift, uthyrning, framtida ombyggnad och framtida försäljning. För att skapa oss en bild om BIM, hur det används idag och vilka förväntningar som finns branschen, har vi intervjuat förvaltare, systemansvariga och BIM-experter. Vi har även sökt information i rapporter och tidsskrifter.

Computer Integrated Construction Project Management (CPM) supported by product and process models can be seen as a future type of integration structure facilitating the solution of various management problems in the fragmented Construction Industry. The key to success is directly correlated with the comprehensive integration of currently isolated IT applications. However, despite that a number of initiatives have been developed, no fully generic models have yet to be formally standardized. This topic has been the subject of intensive research during the last decades. In this thesis a Computer Integrated CPM approach, which is supported by IFC (Industry Foundation Classes) and ISO9001:2000 Quality Management System, is proposed. The main aim is to provide integration of product, process and organizational information to help achieve the interoperability of the involved actors and tools in a concurrent environment. According to implied requirements which are represented in the ‘state of the art’ section, the fundamental concepts are presented in two parts as: (1) realization of CPM in an IT concept and (2) formalization of IFC Views for software interoperability on the example of Bidding Preparation Phase. In order to realize a generic framework using a high-level process core model named Organizational Management Process (OMP) model, different aspects have been brought together into a consistent life cycle structure. These are: (1) a set of layered processes based on ISO procedural definitions, (2) software integration requirements based on Construction Management Phases, (3) application methods of the Procurement System and (4) Organizational data. This provides for synchronizing technical products, processes, documents, and actors in their inter-relationship. The framework is hierarchically structured in three layers Phases – Processes - Product data. The developed IT Management Processes (ITMP) which are used as a baseline for the IFC Views implementation are derived from the OMP. Moreover, in order to support completeness, a mapping structure between processes and scenarios based on the Procurement Systems was constituted. The representation of OMP and ITMP is provided by using the ARIS eEPC (extended event-driven process chain) modeling method. On the basis of a generalized representation of product data, a system-wide integration model for heterogeneous client applications which supports different CPM areas can be achieved. IFC Product Data Model integrates different domains thereby enabling coordination of bidding preparations. However, there is a need to realize individual model subsets. i.e. views of the product model. In this context, adaptable views were developed based on ITMP. The defined resources’ relevancies to IFC Objects are examined by realizing central information elements. These provide a mapping structure between process resources and IFC Classes. On that basis integration of process and product models can be accomplished. In order to realize IFC Views, IFC Concepts and IFC Instance Diagrams were developed based on IFC View Definition Format. The grouping of IFC Concepts enables the implementation of the adaptable IFC Views that are required for standardized system integration. This is achieved with the help of formal specification using the Generalized Subset Definition Schema. The validation has been made based on an alphanumerical comparison. The selected 3D full-model and the developed IFC View for Product Catalog models are compared in this context. There are two consequences observed. In the first case, which also addresses Unit Price Procurement systems, the desired results were obtained by filtering the required data. However, when the results were compared for Design &amp;amp; Build and Lump-sum Procurement Systems (contracts), an extension need was observed in the IFC Model. The solution is provided via formalization of cost data and material analysis information by an extension of IFC Concept namely ‘IfcConstructionResource’ with new classes and with new relations. Thereby a common information model based on the data schema of the IFC standard is constituted. / Das von Produkt- und Prozessmodellen unterstützte computerintegrierte Bauprojektmanagement (CPM) kann als der zukünftige Typ der Integrationsstruktur angesehen werden, der die Lösung verschiedener Baumanagementprobleme in der fragmentierten Bauindustrie erleichtern kann. Der Schlüssel zum Erfolg steht in direkter Beziehung zu einer umfassenden Integration derzeit getrennter IT-Anwendungen. Trotz zahlreich entwickelter Ansätze, die zur Verfügung gestellt wurden, sind bisher noch keine vollständig generischen Modelle formell standardisiert worden, obwohl dies in den letzten Jahrzehnten ein Thema intensiver Forschung war. In dieser Promotionsschrift wird eine computerintegrierte CPM-Methode, die auf Basis der IFC (Industry Foundation Classes) und dem Qualitätsmanagement ISO 9001:2000 aufbaut, vorgeschlagen. Das Hauptziel besteht in der Schaffung der Integration von Produkt-, Prozess- und Organisationsinformationen, um die Interoperabilität der beteiligten Akteure und Tools in einer parallelen Umgebung erreichen zu können. Entsprechend den Anforderungen, die im Abschnitt „Stand der Technik“ aufgeführt sind, werden die vorgeschlagenen, grundlegenden Konzepte in zwei Bereiche aufgeteilt: (1) Umsetzung der CPM-Prozesse in ein IT-Konzept und (2) Formalisierung der IFC-Sichten für die Interoperabilität von Software, beispielhaft ausgeführt für die der Ausschreibungsphase. Um einen generischen Rahmen unter Verwendung eines hochrangigen Prozesskernmodells, das als organisatorischer Managementprozess (OMP) bezeichnet wird, zu realisieren, werden zuerst die verschiedenen Aspekte in einer konsistenten Lebenszyklenstruktur zusammengefügt. Diese sind: (1) eine Menge hierarchisch geschichteter Prozesse, erstellt auf der Grundlage der Verfahrensdefinitionen von ISO 9001, (2) die Softwareintegrationsanforderungen auf der Grundlage der Baumanagementphasen, (3) die Anwendungsmethoden des Beschaffungssystems und (4) die Organisationsdaten. Dadurch wird die Synchronisation der in Wechselbeziehung stehenden technischen Produkte, Prozesse, Dokumente und Akteure geschaffen. Das gesamte System ist hierarchisch in die drei Ebenen Phasen – Prozesse – Produktdaten strukturiert. Die entwickelten IT-Managementprozesse (ITMP), die als Grundlage für die IFC-Implementierungssichten dienen, werden aus dem OMP hergeleitet. Der Vollständigkeit halber, wird eine Abbildungsstruktur zwischen den Prozessen und den Szenarien, die die Beschaffungssysteme beschreiben, entwickelt. Die Darstellung der OMP und ITMP erfolgt unter Verwendung der erweiterten ereignisgesteuerten Prozessketten (eEPK) nach der ARIS-Modelliermethode. Auf der Grundlage einer verallgemeinerten Darstellung der Prozessdaten kann das systemweite Integrationsmodell für heterogene Client-Anwendungen, das verschiedene CPM-Bereiche unterstützt, erreicht werden. Das IFC-Produktdatenmodell integriert verschiedene Domänen und ermöglicht somit die Koordinierung der hier beispielhaft gewählten Ausschreibungsbearbeitungen. Hierzu ist es notwendig, Teilmodelle, d. h. Sichten des Produktmodells zu erzeugen. Entsprechend wurden anpassbare Sichten auf der Grundlage von ITMP entwickelt. Die Bedeutung der in diesem Zusammenhang identifizierten Informationsprozessressourcen in Bezug auf die IFC-Objekte wurde durch die Einführung zentraler Informationselemente, sog. IFC Concepts, untersucht. Diese stellen eine Abbildungsstruktur zwischen den Prozessressourcen und IFC-Klassen zur Verfügung. Auf dieser Grundlage konnte die Integration von Prozess- und Produktmodellen erreicht werden. Um die IFC-Sichten zu realisieren, wurden auf der Grundlage des IFC-Sichtendefinitionsformats IFC-Konzepte und IFC-Instanzendiagramme entwickelt. Die Gruppierung in IFC-Konzepten ermöglichte die Implementierung von anpassbaren IFC-Sichten, die für die standardisierte Systemintegration erforderlich sind. Diese wird mit Hilfe einer formellen Spezifikation unter Verwendung der verallgemeinerten Subset-Definitionsschema-Methode (GMSD) erreicht. Die Validierung erfolgte auf der Grundlage eines alphanumerischen Vergleichs, in dem ein ausgewähltes 3D-Produktmodell und die daraus entwickelte IFC-Sicht für das Produktkatalogmodell verglichen wurden. Es ergaben sich zwei Schlussfolgerungen. Im ersten Fall, der auch das Einheitspreisbeschaffungssystem betrifft, konnten die gewünschten Ergebnisse direkt durch Filterung der erforderlichen Daten erhalten werden. Beim Vergleich der Ergebnisse sowohl für Pauschal-, als auch für Entwurfs- und Baubeschaffungssysteme (Verträge) wurde jedoch festgestellt, dass für das IFC-Modell ein Erweiterungsbedarf besteht. Eine Lösung wurde über die Formalisierung der Kostendaten und Materialanalyseinformationen durch Erweiterung des IFC-Konzepts IfcBauRessource mit neuen Klassen und mit neuen Beziehungen erreicht. Somit erhält man ein allgemeines Informationsmodell auf der Grundlage des Datenschemas des IFC-Standards.

The specification of building material is required in multiple phases of engineering and construction projects towards holistic BIM implementations. Building material information plays a vital role in design decisions by enabling different simulation processes, such as energy, acoustic, lighting, etc. Utilization and sharing of building material information between stakeholders are some of the major influencing factors on the practical implementation of the BIM process. Different meta-data schemas (e.g. IFC) are usually available to represent and share material information amongst partners involved in a construction project. However, these schemas have their own constraints to enable efficient data sharing amongst stakeholders. This paper explains these constraints and proposes a methodological approach for the representation of material data using semantic web concepts aiming to support the sharing of BIM data and interoperability enhancements in collaboration workflows. As a result, the DICBM (https://w3id.org/digitalconstruction/BuildingMaterials) ontology was developed which improves the management of building material information in the BIM-based collaboration process.:Abstract 1. Introduction and Background 1.1 Building Information Modeling for collaboration 1.2 Information management in AEC using semantic web technologies 2 DICBM: Digital Construction Building Material Ontology 2.1 Building Material Data in IFC 2.2 Overview of the building material ontology 2.3 Integration of external ontology concepts and roles 2.4 Material Definition 2.5 Material, Material Type, and Material Property 2.6 Data Properties in DICBM 3 Conclusions Acknowledgments References

Nowadays, digitalization supports and even improves more and more areas such as educa- tion and healthcare. Actually, areas like the building industry benefit from those advantages as well. Pencil drawings have been replaced by feature-rich 3D models with the help of computer-aided design (CAD) software. Moreover, models of buildings became increasingly “smarter” by appending additional information – which is widely known as Building Infor- mation Modeling (BIM). Yet, the most-used data modeling standard – Industry Foundation Classes (IFC) – has shortcomings regarding maintainablity and extensibility. Therefore, this thesis focuses on improving these aspects with the help of role-oriented modeling. A motivating introduction will mark the beginning by familiarizing the idea of BIM, proposing the methodology and the research questions for this thesis, and elaborating on the status quo. Afterwards, a deeper understanding of IFC and its core problems will set the basis for the development of a solution to the identified deficiencies. Prior to that, the basics in role-oriented modeling will be explained. Consequently, the developed role-oriented so- lution – namely Industry Foundation Classes with Roles (IFC-R) – will be introduced, followed by a comparison of IFC and IFC-R in order to prove its effects. This will be supported by an evaluation of the comparison, which leads to the conclusion of this thesis and a brief outlook for future research.:1. Introduction 2. Understanding Industry Foundation Classes (IFC) 2.1. Structure and Fundamental Concepts of IFC 2.1.1. Organization and Architecture of IFC 2.1.2. Examination of the Concepts 2.2. The Modeling Language EXPRESS 2.2.1. Building Blocks of EXPRESS 2.2.2. The Influence of EXPRESS on IFC 2.3. Analysis of Core Issues 2.3.1. Adding properties by means of property sets 2.3.2. Orthogonal classification utilizing object typing 3. Developing a Role-oriented Solution 3.1. Industry Foundation Classes with Roles (IFC-R) 3.1.1. Role-oriented Modeling with CROM 3.1.2. IFC-R:Models and Tools 3.2. Prototypical Implementation applying IFC-R 4. Comparing IFC and IFC-R 4.1. Definition of used Software Metrics 4.1.1. Identifying suitable measurement methods 4.1.2. The Use Case Points (UCP) method 4.1.3. Adapting the UCP method 4.1.4. Supporting Metrics 4.2. Evaluation of IFC and IFC-R 4.2.1. Gathering the supporting metrics 4.2.2. Applying the UCP method 4.3. Problems and Interim Conclusion 5. Conclusion and Outlook References Appendix A. Figures Appendix B. Code Listings

Computer Integrated Construction Project Management (CPM) supported by product and process models can be seen as a future type of integration structure facilitating the solution of various management problems in the fragmented Construction Industry. The key to success is directly correlated with the comprehensive integration of currently isolated IT applications. However, despite that a number of initiatives have been developed, no fully generic models have yet to be formally standardized. This topic has been the subject of intensive research during the last decades. In this thesis a Computer Integrated CPM approach, which is supported by IFC (Industry Foundation Classes) and ISO9001:2000 Quality Management System, is proposed. The main aim is to provide integration of product, process and organizational information to help achieve the interoperability of the involved actors and tools in a concurrent environment. According to implied requirements which are represented in the ‘state of the art’ section, the fundamental concepts are presented in two parts as: (1) realization of CPM in an IT concept and (2) formalization of IFC Views for software interoperability on the example of Bidding Preparation Phase. In order to realize a generic framework using a high-level process core model named Organizational Management Process (OMP) model, different aspects have been brought together into a consistent life cycle structure. These are: (1) a set of layered processes based on ISO procedural definitions, (2) software integration requirements based on Construction Management Phases, (3) application methods of the Procurement System and (4) Organizational data. This provides for synchronizing technical products, processes, documents, and actors in their inter-relationship. The framework is hierarchically structured in three layers Phases – Processes - Product data. The developed IT Management Processes (ITMP) which are used as a baseline for the IFC Views implementation are derived from the OMP. Moreover, in order to support completeness, a mapping structure between processes and scenarios based on the Procurement Systems was constituted. The representation of OMP and ITMP is provided by using the ARIS eEPC (extended event-driven process chain) modeling method. On the basis of a generalized representation of product data, a system-wide integration model for heterogeneous client applications which supports different CPM areas can be achieved. IFC Product Data Model integrates different domains thereby enabling coordination of bidding preparations. However, there is a need to realize individual model subsets. i.e. views of the product model. In this context, adaptable views were developed based on ITMP. The defined resources’ relevancies to IFC Objects are examined by realizing central information elements. These provide a mapping structure between process resources and IFC Classes. On that basis integration of process and product models can be accomplished. In order to realize IFC Views, IFC Concepts and IFC Instance Diagrams were developed based on IFC View Definition Format. The grouping of IFC Concepts enables the implementation of the adaptable IFC Views that are required for standardized system integration. This is achieved with the help of formal specification using the Generalized Subset Definition Schema. The validation has been made based on an alphanumerical comparison. The selected 3D full-model and the developed IFC View for Product Catalog models are compared in this context. There are two consequences observed. In the first case, which also addresses Unit Price Procurement systems, the desired results were obtained by filtering the required data. However, when the results were compared for Design &amp;amp; Build and Lump-sum Procurement Systems (contracts), an extension need was observed in the IFC Model. The solution is provided via formalization of cost data and material analysis information by an extension of IFC Concept namely ‘IfcConstructionResource’ with new classes and with new relations. Thereby a common information model based on the data schema of the IFC standard is constituted. / Das von Produkt- und Prozessmodellen unterstützte computerintegrierte Bauprojektmanagement (CPM) kann als der zukünftige Typ der Integrationsstruktur angesehen werden, der die Lösung verschiedener Baumanagementprobleme in der fragmentierten Bauindustrie erleichtern kann. Der Schlüssel zum Erfolg steht in direkter Beziehung zu einer umfassenden Integration derzeit getrennter IT-Anwendungen. Trotz zahlreich entwickelter Ansätze, die zur Verfügung gestellt wurden, sind bisher noch keine vollständig generischen Modelle formell standardisiert worden, obwohl dies in den letzten Jahrzehnten ein Thema intensiver Forschung war. In dieser Promotionsschrift wird eine computerintegrierte CPM-Methode, die auf Basis der IFC (Industry Foundation Classes) und dem Qualitätsmanagement ISO 9001:2000 aufbaut, vorgeschlagen. Das Hauptziel besteht in der Schaffung der Integration von Produkt-, Prozess- und Organisationsinformationen, um die Interoperabilität der beteiligten Akteure und Tools in einer parallelen Umgebung erreichen zu können. Entsprechend den Anforderungen, die im Abschnitt „Stand der Technik“ aufgeführt sind, werden die vorgeschlagenen, grundlegenden Konzepte in zwei Bereiche aufgeteilt: (1) Umsetzung der CPM-Prozesse in ein IT-Konzept und (2) Formalisierung der IFC-Sichten für die Interoperabilität von Software, beispielhaft ausgeführt für die der Ausschreibungsphase. Um einen generischen Rahmen unter Verwendung eines hochrangigen Prozesskernmodells, das als organisatorischer Managementprozess (OMP) bezeichnet wird, zu realisieren, werden zuerst die verschiedenen Aspekte in einer konsistenten Lebenszyklenstruktur zusammengefügt. Diese sind: (1) eine Menge hierarchisch geschichteter Prozesse, erstellt auf der Grundlage der Verfahrensdefinitionen von ISO 9001, (2) die Softwareintegrationsanforderungen auf der Grundlage der Baumanagementphasen, (3) die Anwendungsmethoden des Beschaffungssystems und (4) die Organisationsdaten. Dadurch wird die Synchronisation der in Wechselbeziehung stehenden technischen Produkte, Prozesse, Dokumente und Akteure geschaffen. Das gesamte System ist hierarchisch in die drei Ebenen Phasen – Prozesse – Produktdaten strukturiert. Die entwickelten IT-Managementprozesse (ITMP), die als Grundlage für die IFC-Implementierungssichten dienen, werden aus dem OMP hergeleitet. Der Vollständigkeit halber, wird eine Abbildungsstruktur zwischen den Prozessen und den Szenarien, die die Beschaffungssysteme beschreiben, entwickelt. Die Darstellung der OMP und ITMP erfolgt unter Verwendung der erweiterten ereignisgesteuerten Prozessketten (eEPK) nach der ARIS-Modelliermethode. Auf der Grundlage einer verallgemeinerten Darstellung der Prozessdaten kann das systemweite Integrationsmodell für heterogene Client-Anwendungen, das verschiedene CPM-Bereiche unterstützt, erreicht werden. Das IFC-Produktdatenmodell integriert verschiedene Domänen und ermöglicht somit die Koordinierung der hier beispielhaft gewählten Ausschreibungsbearbeitungen. Hierzu ist es notwendig, Teilmodelle, d. h. Sichten des Produktmodells zu erzeugen. Entsprechend wurden anpassbare Sichten auf der Grundlage von ITMP entwickelt. Die Bedeutung der in diesem Zusammenhang identifizierten Informationsprozessressourcen in Bezug auf die IFC-Objekte wurde durch die Einführung zentraler Informationselemente, sog. IFC Concepts, untersucht. Diese stellen eine Abbildungsstruktur zwischen den Prozessressourcen und IFC-Klassen zur Verfügung. Auf dieser Grundlage konnte die Integration von Prozess- und Produktmodellen erreicht werden. Um die IFC-Sichten zu realisieren, wurden auf der Grundlage des IFC-Sichtendefinitionsformats IFC-Konzepte und IFC-Instanzendiagramme entwickelt. Die Gruppierung in IFC-Konzepten ermöglichte die Implementierung von anpassbaren IFC-Sichten, die für die standardisierte Systemintegration erforderlich sind. Diese wird mit Hilfe einer formellen Spezifikation unter Verwendung der verallgemeinerten Subset-Definitionsschema-Methode (GMSD) erreicht. Die Validierung erfolgte auf der Grundlage eines alphanumerischen Vergleichs, in dem ein ausgewähltes 3D-Produktmodell und die daraus entwickelte IFC-Sicht für das Produktkatalogmodell verglichen wurden. Es ergaben sich zwei Schlussfolgerungen. Im ersten Fall, der auch das Einheitspreisbeschaffungssystem betrifft, konnten die gewünschten Ergebnisse direkt durch Filterung der erforderlichen Daten erhalten werden. Beim Vergleich der Ergebnisse sowohl für Pauschal-, als auch für Entwurfs- und Baubeschaffungssysteme (Verträge) wurde jedoch festgestellt, dass für das IFC-Modell ein Erweiterungsbedarf besteht. Eine Lösung wurde über die Formalisierung der Kostendaten und Materialanalyseinformationen durch Erweiterung des IFC-Konzepts IfcBauRessource mit neuen Klassen und mit neuen Beziehungen erreicht. Somit erhält man ein allgemeines Informationsmodell auf der Grundlage des Datenschemas des IFC-Standards.

Att utföra kostnadskalkyler och mängdavtagningar utifrån objektbaserade 3D-modeller har visat sig vara problematiskt då modellerna inte uppfyller de förväntade kraven på informationsnivå. De bristande modellerna leder till en större osäkerhet då kalkylatorn skall upprätta kostnadskalkyler, vilket utgör bakgrunden till de frågeställningar som rapporten utgörs av. Projektet Biomedicum, som skall bli det toppmoderna laboratoriet åt Karolinska Institutet bedrivs som ett fullskaligt BIM-projekt, där de objektbaserade 3D-modellerna utgör underlaget för bland annat kostnadskalkyler i systemhandlingsskedet. Kalkylatorn i projektet, har uttryckt ett missnöje gällande kvaliteten i modellerna, och menar på att det finns stora brister som leder till att risken för att osäkra kalkyler upprättas ökar. Denna rapport kommer således att se över hur det är möjligt att kvalitetssäkra en objektbaserad 3D-modell i IFC-format i programvaran Solibri Model Checker, utifrån de projektspecifika kraven som råder i projektet. Rapporten utgörs av en fallstudie och en litteraturstudie, och till viss del även av intervjuer. I fallstudien undersöks det om Solibri Model Checker är kapabel till att kontrollera modellerna utifrån de projektspecifika krav som råder i projektet, samt att analysera resultatet av kontrollerna som har utförts. Intervjuerna i sin tur har legat till grund för ett antal problem som har ansetts vara relevanta för rapporten. Problem som kan härledas till juridiska svårigheter, avsaknad av en gemensam branschstandard, meningsskiljaktigheter kring innehållet i en objektbaserad 3D-modell etc.  I fallstudien har det visat sig att 3D-modellerna är bristande ur kalkylsynpunkt. Detta leder till svårigheter och osäkerheter då Skanska upprättar kalkylerna. Anledningarna till detta är flera. Det handlar bland annat om att konstruktören använder sig av en modelleringsteknik som inte är anpassad för kalkylering, men även att det inte finns tydliga riktlinjer om vilken information som bör finnas i objekten i systemhandlingsskedet, vilket har framgått under intervjuerna. Det har även framgått under intervjuerna, att ett avgörande problem som kan anknytas till att modellerna är av bristande kvalitet ur kalkylsynpunkt, är på grund av att det inte har ställts krav tillräckligt tidigt i processen. Vad som är viktigt för att få en fungerande process där de objektbaserade 3D-modellerna skall användas för mängdavtagningar och kostnadskalkyler, är att i ett tidigt skede fastslå vilken information som behövs i objekten för att trovärdiga kalkyler skall vara möjliga att upprätta. Vikten av att det finns en tydlig IT-handledning är även stor, då det är handledningen som ligger till underlag om vilken information som skall finnas med i modellerna. / To perform quantity takeoffs and cost estimates based on 3D models is problematic, if the models do not meet the expected demands of information. The weaknesses of the models leads to uncertainty when the calculator will establish cost estimates, which forms the background to the issues that the thesis constitutes. The project Biomedicum is conducted as a full-fledged BIM project, where the object based 3D models are the basis for cost estimates in the system phase. The calculator in the project has expressed dissatisfaction regarding the quality of the models, and believes that there are major flaws that lead to the risk of uncertain calculations increasing. Of this reason, this thesis will analyze the possibilities about ensuring the quality of an object based 3D model in IFC format, by using the software Solibri Model Checker. This thesis consists of a literature review, interviews and a case study. The case study examines whether Solibri Model Checker is capable of checking the models based on the project specific requirements, and to analyze the results of the checks that have carried out in the case study. The interviews have been the basis for the number of problems that have been considered relevant for the thesis. Problems that can be traced to legal difficulties, lack of a common set requirements, disagreements about the content of an object based 3D model etc. The case study has shown that the 3D models are inadequate to perform cost estimates, which leads to difficulties and uncertainties in the calculation process. There are several reasons for this. The designers of the project have used wrong modeling technique for quantity takeoff and cost estimating. But also that there are no clear guidelines as to what information should be included in the items in the document stage system, which has emerged during the interviews. It has also emerged during the interviews that crucial problems that may be linked to the models are of poor quality, because it has not been required early enough in the process. What is important to get a working process in which the object-based 3D models to be used for quantity takeoffs and cost estimates, is that in the early stages determine what information is needed in the objects to credible estimates will be possible to establish. The importance of a clear IT manual is also great, as it is the manual who serves as the basis of the information to be included in the models.

Energy analysis at different stages of a building’s life-cycle allows designers and engineers to make proper design decisions, which will enhance the efficiency and energy saving measures. However, energy analysis of a building using traditional methods at every stage of the project is time-consuming and more labor intensive. Thus, energy simulations of buildings are rarely introduced in all design stages of the project. This study focuses on data transfer process from BIM model (Revit) to energy simulation model (IES ‹VE›) using OpenBIM meta-data model - Industry Foundation Classes (IFC) as an exchangeable file format. This data sharing process simplifies the complexity in energy modeling and allows to investigate different design alternatives in each phase of the building’s life-cycle. To investigate the efficiency and completeness of this data transfer process, a demonstration of data sharing is carried. By evaluating the results from the demonstration, efficiency gaps are identified in the data transferred process. A detailed investigation on the cause of efficiency gaps in data sharing is carried out and incorporated in this paper.:Abstract 1. Introduction 2. Building Energy Simulation 2.1. Categorization of Energy Simulation Models 3. Data Sharing Requirements - IFC 4. Data Sharing Demonstration 4.1. BIM model 4.2. Data investigation with model viewer 4.3. Data quality verification in energy simulation model 4.3.1. Evaluation of Results 5. Conclusion References