A strategic management plan addresses one or more of the elements of a business plan, but the primary focus is on the management team and its personnel. It may incorporate the development of manuals of operation, procedure, policy, and/or organization. Ultimately, the objective is to maintain or improve productivity, maximize internal control of resources, and enhance relationships (internally and/or externally).
A strategic management plan fits primarily into the operational aspects of a business plan where you list staff requirements, management philosophy, key personnel descripttions, and the credentials of the key personnel.
A third document is the strategic business plan. This document is generally a five year projection, and very generalized as to detail. It focuses on developing and defining long-term goals and objectives of the company. It may also incorporate timelines for the accomplishment of milestones.
Remember there is much divergence in the definitions of the three documents above described. It provided definitions based on personal experiences, not textbook interpretations.