The integration of ‘Live’ entities with a ‘Virtual’ or ‘Constructive’ simulation provides many new possibilities in the domain of analysis, design, acquisition and training. For example, a live training exercise can be enhanced by inserting constructive simulated forces that replace scarce operational units or equipment (this is called constructive wrapping). The LVC research programme at TNO Defence, Security and Safety investigates the possible benefits and pitfalls of integrating Live, Virtual and Constructive simulations. It investigates how the integration should take place from a technical perspective by demonstrating innovative LVC techniques using a number of case studies to develop relevant LVC applications. The programme also researches applicable LVC architectures and development processes based on the results of the case studies in this programme and based on available best practices and standards. This paper provides an overview of the case studies and describes the first results of the LVC architecture study in this programme.