In large projects, briefing documents tend to be voluminous reports, bursting with texts and tables, containing a multitude of requirements on a wide variety of topics, ranging from room sizes and sustainability to indoor climate and security. With such a vast amount of information it is all too easyfor both client and design teamto lose sight of the big picture. This introduces the risk of requirements being overlooked or ignored, or not properly updated and verified during the design process. A good way of dealing with this information problem is to capture requirements in a computer model or database in which all requirements have their own designated place. Using such tools, clients and their design teams no longer have to plough through paperinstead they can click, browse and search in a digital model, which should make it easier to find, manage and analyse information. A vital additional advantage of such a way of working lies in the possibility of linking client requirements to the design teams BIM models. BIM (Building Information Modelling) has been a hot topic in the construction industry for years, but for too long there has been a one-sided focus on advanced 3D models for architects and engineers, with scant attention being paid to the role of the client. In recent years, however, there has been a growing awareness that client requirements are the starting point for all design activities and that these should be integrated into the projects BIM models. In other words: BIM begins with modelling the brief.There are several digital briefing tools available on the market, such as BriefBuilder (sponsor of this publication). These tools differ in scope and functionality, but they all aim to structure large sets of requirements and make the briefing process more efficient. Not surprisingly, many of these tools were first developed for hospital projects, where the sheer quantity of requirements can be overwhelming, but their usage is rapidly spreading to other types of projects as well. The exact workings of these tools are quite complicated, but this chapter explains some of the basics. The topics to be discussed are:-Collating information -Texts versus models-Spaces and other objects-Decomposition-Standard spaces-Design verification-Test plans131