Part 3 of this framework document shows the assignment of responsibility for the performance of functions to each individual officer down to and including Principal level. The responsibilities so assigned are articulated through the department's system of Divisional business plans to reflect the priorities and objectives of the department, as set out in its Statement of Strategy. The assignment of responsibility for the performance of functions by individual officers, or grade or grades of officer, below Principal level shall be handled administratively on the basis of the personal (or team) work objectives identified under or associated with the department’s Divisional business plans. The latter, which are reviewed and updated on an annual basis to keep pace with changing needs and priorities, are informed both by the department's Statement of Strategy and by its Performance Management and Development System. They provide a practical means of prioritising and managing the day-to-day work of the department at unit, team and individual level.