Director Of Talent Question:

Typically, an organization nurtures the senior management level and those in critical positions, because when such employees leave, it strongly affects the operation of the organization. Mid-level employees are nurtured when they hold a critical position, or when the employee is a potential successor in the long-term succession plan.
More and more organizations, however, also introduce the process at mid-level. However, it then takes place at the departmental level and not at the level of the organization. Each organizational unit builds its own talent pool, which makes it a part of the organization’s general pool.