<P> In 1979, Ken Blanchard founded Blanchard Training & Development, Inc., (later The Ken Blanchard Companies) together with his wife Margie Blanchard and a board of founding associates . Over time, this group made changes to the concepts of the original Situational Leadership Theory in several key areas, which included the research base, the leadership style labels, and the individual's development level continuum . </P> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2015) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (July 2015) (Learn how and when to remove this template message) </Td> </Tr> <P> The Situational Leadership II (SLII) Model acknowledged the existing research of the Situational Leadership Theory and revised the concepts based on feedback from clients, practicing managers, and the work of several leading researchers in the field of group development . </P>

The development level in the slii® model is