This document discusses how an organization can change its HR hierarchy structure based on changing needs and circumstances. It provides examples of adding new positions due to new projects, subtracting positions due to downsizing or financial constraints, and succession planning due to promotions, resignations, or job rotations. The document uses examples to illustrate how the hierarchy structure may shift when an HR manager is promoted, an employee resigns, or an employee takes a job rotation. Maintaining a flexible and motivated workforce is emphasized through strategies like promotion, new roles, and internal recruitment.