For example, if we wanted to learn about how noncompetitive awards were reviewed in an agency, a good case study would obtain information from the agency head, the head of the procurement division, the inspector general's office, the contracts officer responsible for selected awards, staff involved in the reviews for these awards, counterpart persons from the contractors' procurement and program operations staff, and the legal divisions within the agency and the contractors.
A good case study would not obtain information from many different departments.