The Technical Design of the mechanical and electrical services is the item most likely to result in refinements to the Handover Strategy during Stage 4, as the design is progressed to the next level of detail. Stage 4 is when the majority of design work is undertaken, although the nature of the design activity is entirely different from that in the earlier stages. If Stage 4 is to be successful, it is crucial that the lead designer’s contributions at Stage 3 have resulted in information that is robust enough to allow each design team member to substantially commence the preparation of their own Stage 4 Information Exchanges information independently. The Design Responsibility Matrix is generated at Stage 1 for incorporation into the various contracts. Procurement is by far the biggest influence on the Stage 4 Design Programme, fundamentally determining the amount of overlap between the design work of the design team and that of the specialist subcontractors with design responsibilities.