Which of the following is NOT a typical lag measure used in succession management?

A) decreased number of bosses as talent developers
B) increased ratio of internal to external hires in key positions
C) increased average number of candidates for key positions
D) decreased average number of positions with no successors

The decreased number of bosses as talent developers is not a typical lag measure used in succession management. Lag measures typically focus on outcomes or results that can be measured after the fact, such as the increased ratio of internal to external hires, increased average number of candidates for key positions, or decreased average number of positions with no successors. The decreased number of bosses as talent developers would be more of a lead measure or activity-based measure, as it focuses on the actions being taken by managers or HR professionals to develop talent within the organization.