In this research it is explored whether product models are a feasible instrument to be applied in the cast in place concrete industry to improve its effectiveness and competitiveness. Analyses are made of today's construction practice and the area of product modelling, after which a new process approach is proposed and studied. Based on the outcome of these analyses, conclusions are drawn and recommendations are made concerning the conditions for the applications of product models in the cast in place concrete industry. The research work has mainly been conducted at Luleå University of Technology (LTU) in close co-operation with Betongindustri and JM AB. Betongindustri, representing the cast in place concrete industry in this study, is the main concrete supplier of JM. JM's core activity is the development of residential structures. JM and Betongindustri co-operate closely together and occasionally encounter unfavourable situations that are typical to today's construction practice. Several studies have shown that the construction industry in general suffers from inadequate information management, leading to process and product inefficiencies, such as the duplication of work and false information. From an analysis of the current building practice of JM and Betongindustri it becomes clear that the shortcomings of the building processes are concentrated in two key areas: the current information flow leads to inefficiencies in projects and the lack of a data standard leads to difficulties in managing data. Betongindustri for example experiences difficulties in providing product knowledge support in projects by JM. Plans and solutions have often already been decided on and budgeted for when Betongindustri provides input. As a result, valuable product and process knowledge is often not fully adapted and used in a project. Improved data exchange and the overall management of information appear to be key solutions in this respect. A promising technology for data exchange and data sharing is product data technology and product modelling. In product models the information about a building, such as the geometry and additional data needed for production of the building, is stored as information objects in databases. Product models have numerous advantages such as automatic quantity take-off, quick costs analyses of a design, integration of product property data in a design and construction simulation. The Finnish construction company YIT for example already applies a model based construction approach, leading to savings up to 15% of the total project costs. Within this research project two areas of the processes of JM and Betongindustri are taken into account in which product modelling can contribute significantly. 1. A model based knowledge library, in which information is stored in a well structured and neutral format, can support adequate case based reasoning by different actors in various project stages with different applications. Old solutions can be adapted to solve or comment new demands. Valuable process and product knowledge is structurally (re)used in this way, contributing to the efficiency of projects; 2. Product and process knowledge of Betongindustri, which supports the early design- and planning process of JM can to a large extend be integrated over the Internet in a product model that is managed by JM. In this research the information related to the drying process of concrete slabs is taken into account, serving as an example for a broader approach. This early design- and planning support enables more efficient processes and products. In this feasibility study it is shown that the application of product models in the cast in place concrete industry as an instrument to improve its effectiveness and competitiveness is possible. It is unlikely that a single shared model is adapted and completely feasible in the near feature. Instead, several islands of integration are possible, which can lead to an integration and industrialisation of today's construction practice. It must be noted that adapting IT in construction is not only a model- and computer related issue, but also requires a transition on an organisational- and building technology level. JM is relatively large and integrates a broad range of actors in the construction industry. It is therefore an organisation with potential to facilitate a change towards a model based construction approach.