In the narrative of "People in Glass Houses" by Shirley Hazzard, the protagonist begins his career focusing on interim reports, which provide a snapshot of an organization's performance over a shorter period. This role is essential for understanding ongoing operations and making timely assessments. His proficiency and dedication to this task lead to his promotion.

As he progresses in his profession, he is entrusted with the responsibility of creating annual reports. These comprehensive documents reflect the overall achievements and challenges of the organization over the entire year, indicating a significant step in his career and highlighting his growth within the field.