With the new technology of creating building design, many changes of traditional processes have to be set in order to reach project documentation and project design itself in higher quality level. As a traditional project documentation is changing in “digital twin” of building work, the way of building work design changes too. Building design and project documentation do not serve only for the building construction, maintenance and operation. Project documentation is the output, also the input – both at the same time - in connection with further building legislation, landscape planning, etc. BIM model, nowadays the highest quality of project documentation, should communicate with many related registers. Important basic information is as an input for the project design, afterwards information from the project design should be reflected as an output for the enlisting in related registers. Due to the absence of efficient digitization of the construction industry, the relevancy, correctness and reliability of information in the related registers is not very high in the Czech Republic, at this time. Digitization of construction industry and implementation of BIM technology promises many benefits. The magnitude of these benefits depends on how the data exchange is modified in the construction process during the whole building lifecycle. This paper reveals possibilities of basic principles of the new way of design using BIM technology, connections of BIM model data and related registers and their data exchange in the environment of Czech Republic´s legislation. The more correctly processed the model of the building work, the better and more reliable information for future designs.

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Abstract. Paper´s focus is on differences between traditional modelling in 2D software and modelling within the BIM technology. Research uncovers failures connected to the traditional way of designing and construction of project documentation. There are revealed and shown mismatches within the project documentation. Solution within the Building information modelling Technology is outlined. As a reference, there is used experience with design of specific building in both ways of construction of project documentation: in the way of traditional modelling and in the way when using BIM technology, especially using Level of Development. Output of this paper is pointing to benefits of using advanced technology in building design, thus Building Information Modelling, especially Level of Development, which leads to reducing failures rate within the project documentation.

Nowadays, we use many of the modern technologies to make the optimal design of new buildings. Building Information Modeling Technology offers state-of-the-art solutions that allow the design of a building to create in many variants a realistically time-consuming development process and, by virtue of an almost fully automatic assessment of the variants, choose the most appropriate one according to the required criteria. Such a design of the building assumes its optimal behavior according to the criteria required by the investor, the user and other stakeholders, but also helps to keep the construction towards the sustainable development goals. There are many existing buildings that have obsolete properties. The management and durability of such buildings is very costly. Such buildings should be refurbished to meet the properties and imitations of new building behavior. 3D scanning technology goes hand in hand with the building sector digitization and outputs from 3D scanning technology serves as a useful basis for further working with data using BIM technology. This paper outlines the possibilities of creation of basics for current documentation with graphical information of these buildings and how it may serve for evaluation of possible options for repairs and reconstructions through the whole building lifecycle and further use in facility management.