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Encouraged by the trend of model-based working, integrated practice as a new context of construction projects and the planned number of investments at the state level, the Croatian Chamber of Civil Engineers has developed specialized guidelines for Building Information Modelling approach in infrastructure projects. The guidelines were presented to the professional public in 2021 with a clear message that it is the right time for Croatian companies to implement BIM approach in their operations to increase competitiveness in domestic and foreign markets, raise the quality of design and construction and reduce construction and maintenance costs. The Guidelines describes BIM approach and procedures during design, collaboration and coordination, construction and maintenance. An overview of the most widespread BIM tools in the field of infrastructure projects, basic settings of project cooperation, a common shared environment and interoperability is given. Digital collaboration modes, types of models, levels of detail and model management complete the first part of the document. The second part of the Guidelines describes key processes in BIM implementation at the company and project level. This content provides an overview of how BIM affects the current working model and what needs to be done to move to a fully collaborative model-based infrastructure project development. The guidelines are supported by LOD tables for the most common types of buildings in infrastructure projects. In order to overcome the lag in adoption of BIM in infrastructure projects it is necessary to identify the key challenges and the most common reasons that stand in the way of its significant and frequent application. The results of research conducted so far indicate that these include lack of cooperation, costs associated with the BIM adoption, lack of knowledge and skills, software limitations, lack of compatible product information, national context for classifying product data and clearly defined standards for sharing data between project participants.

En el presente proyecto, se estudia la introducción de la metodología BIM aplicada a la fase de ejecución de una obra de reforma integral, como es la que se está desarrollando en el Colegio Mayor Hernando Colón. A partir de la planimetría obtenida en formato CAD, se elabora un modelo BIM como herramienta de apoyo a la dirección de ejecución, de esta manera se busca reducir los tiempos en la toma de decisiones en las reuniones de la dirección facultativa, utilizarlo como soporte, para recoger las modificaciones que se realizan durante la ejecución de un proyecto faseado y como contenedor de información para su posterior mantenimiento. La actualización en tiempo real del modelo, ayuda a agilizar los procesos de transferencia de información entre técnicos, evitando así posibles discrepancias entre las modificaciones realizadas por la dirección de ejecución y la dirección de obra. Mediante tablas se extraen las mediciones de los elementos, siendo esto de gran utilidad para la certificación y los acuerdos con la empresa constructora. Por otro lado, la visualización tridimensional de todos los elementos modelados permite la detección de posibles encuentros entre instalaciones, con un nivel de desarrollo idóneo, la interpretación por parte de los técnicos y operarios se facilita. Todo esto nos lleva a afirmar que la metodología BIM es una herramienta que beneficia a la dirección de ejecución en múltiples aspectos. In this project, the introduction of the BIM methodology applied to the phase of implementation of a work of integral reform is studied, such as the one that is being developed in the College of Hernando Colón. From the planimetry obtained in CAD format, a BIM model is developed as a tool to support the execution direction, in this way it seeks to reduce decision making times in the mettings of the optional management, use it as support, to collect the modifications that are made during the execution of a phased project and as an information container for later maintenance. The real-time update of the model helps to streamline the processes of transfer ofinformation between technicians, thus avoiding possible discrepancies between the modifications made by the execution direction and the direction of work. Tables extract the measurements of the elements, this being very useful for certification and agreements with the construction company. On the other hand, the three dimensional visualization of all the modeled elements allows the detection of possible encounters between installations, with an ideal level ofdevelopment, the interpretation by technicians and operators is facilitated. All this leads us to affirm that the BIM methodology is a tool that benefits the execution management in multiple aspects. Universidad de Sevilla. Grado en Edificación

Building Information Modelling (BIM) has the potential to become a technology which will help to use a holistic information repository to generate and represent relevant information in different building life-cycle stages (BLCS) to dedicated groups of stakeholders. However, the scope of model components of BIM data (e.g., IFC meta-data) is limited and some parts of it are not modelled in a manner that supports the diversity of engineering use cases. This paper aims to address this deficit by identifying the capability to formulate inference rules as one of the major benefits in the ontology-based information modelling approach. However, before one can formulate inferencing rules a detailed and in-depth understanding is required on how stakeholder information needs are defined in different BLCS and on how available, open-BIM meta-data models support these information requirements. Therefore, the research progressed initially on existing definitions for Level of Detail (LOD) and selected process-modelling standards (BLCS). In the subsequent part, different renovation Activities and the Stakeholder involvements are analysed. Use cases are defined and used as a grouping mechanism for selected scenarios. Based on these grouping mechanisms, a methodology of how components of a BIM-model could be classified to support automated inferencing in the future. The outcome of this research is an established 6-dimensional intercommunication framework (LOD, BLS, Scenarios, Stakeholders, Use Cases, BIM model data) based on the Linked Building Data approach and focusing on renovation processes optimization. Based on the framework, a renovation Product-Process Modelling ontology is developed to connect existing components and to support new interoperable applications.

The new Italian Procurement Code—L.D. n. 50, 2016—implementing the 2014 European Union Directive, introduced BIM (Building Information Modeling) as an innovative approach to digitalize the construction sector. The recent Decree n. 560 of December 1st 2017 defines the methods and schedule for the gradual introduction of the BIM for the design, execution and management of construction works. BIM procedures involve a radical change in the design approach that goes from the graphical representation to the simulation of a process, both in the field of new constructions and in the field of Cultural Heritage conservation. In this perspective the article shows the results of a survey carried out on historic buildings. It aimed at verifying how much the modeling has remained confined to a low level of development (LOD A, according to the UNI 11337 standard is linked to a merely symbolic level) and those who have gone further by integrating specific and detailed information that allow real time to evaluate the sustainability of different alternatives. The article, which represents a first step of an ongoing research, starting from the regulatory framework of the BIM in Italy, highlights its potential (Sect. 1); the issue of the evaluation is deepened (Sect. 2), with particular reference to the 5D-BIM Project cost management and to the Heritage Building Information Modeling (HBIM).

Information technology is becoming a strong tool in different industries, including construction. The recent trend of buildings designing is leading up to creation of the most comprehensive virtual building model (Building Information Model) in order to solve all the problems relating to the project as early as in the designing phase. Building information modelling is a new way of approaching to the design of building projects documentation. Currently, the building site layout as a part of the building design documents has a very little support in the BIM environment. Recently, the research of designing the construction process conditions has centred on improvement of general practice in planning and on new approaches to construction site layout planning. The state of art in field of designing the construction process conditions indicated an unexplored problem related to connection of knowledge system with construction site facilities (CSF) layout through interactive modelling. The goal of the paper is to present the methodology for execution of 3D construction site facility allocation model (3D CSF-IAM), based on principles of parametric and interactive modelling.