Background. Dr. Tama writes: “The quadrennial reviews are extremely structured and intensive processes that span 10 to 18 months in length They are highly inclusive of departmental staff, and some departments include other agencies, states, localities, and private sector stakeholders.” He found that these reviews are done differently in each of the four departments. Some involve only internal staffs; others engage the public; while others actively engage a range of agencies as well as experts in selected fields. However, in every case, the reviews have produced public reports that set out a vision for where the department is headed in coming years.