Virtual assembly and disassembly (VA&D) usage enables knowledge exchange between design department and assembly production and aftermarket in the product development (PD) process. Utilisation of VA&D tools must be connected to the PD process in robust methods to fully employ this potential. A case study was performed at a manufacturing company to identify virtual activities and their position in the PD process. Assembly production and aftermarket departments have common demands on the utilisation of the VA&D tools in the PD process. Milestones that demands VA&D simulations shall be included in both concept phase and development phase in the PD process.