Succession planning is a process for identifying and developing internal people with the potential to fill key business leadership positions in the company. Succession planning increases the availability of experienced and capable employees that are prepared to assume these roles as they become available. Taken narrowly, "replacement planning" for key roles is the heart of succession planning. Effective succession or talent-pool management concerns itself with building a series of feeder groups up and down the entire leadership pipeline or progression (Charan, Drotter, Noel, 2001). In contrast, replacement planning is focused narrowly on identifying specific back-up candidates for given senior management positions. For the most part position-driven replacement planning (often referred to as the "truck scenario") is a forecast, which research indicates does not have substantial impact on outcomes.
Fundamental to the succession-management process is an underlying philosophy that argues that top talent in the corporation must be managed for the greater good of the enterprise. Merck and other companies argue that a "talent mindset" must be part of the leadership culture for these practices to be effective.