Several possible methods of organizing validation are available, one of which is the establishment of a validation group. For this purpose, the management appoints a person responsible for validation (validation officer), who then forms the group (team, committee). This is headed by a group leader, and represents all major departments: development, production, engineering, quality assurance and control. The composition of the group should be changed from time to time to give opportunities to other people to generate new ideas and to gain experience. The validation group then prepares a programme, which determines the scope of its work, its priorities, the time-schedule, the resources needed, etc. The programme is sent for review and approval to the departments and functions concerned. The final review and approval are the responsibility of the validation officer.