Project control process in building construction is one of the major stakes in securing quality and productivity improvement in the future. We propose to improve the connection between building design and project control by integrating knowledge in a computerised tool, PROJECTOR, whose prototype we present. The analysis of the connection permits the identification of actors, functions and information involved and shows the project manager large part in costs control and scheduling control. His know-how is fundamental to insure information transformation that is linked with the connection. This know-how description has required the elaboration of a conceptual model which describes information organisation, the project manager's basic knowledge formalisation and the research of the different the way of making use of this knowledge. In order to validate our propositions, we have realised the prototype PROJECTOR. This prototype includes a knowledge base obtained from interviews of professionals. We show how a global schedule and then a detailed schedule can be realised from design information (obtained from a CAD system) by connecting a planning software to PROJECTOR.
