Captured thinking: You don't allow your financial people to keep their numbers in their heads. Financial reports are the lifeblood of the numbers side of any business, no matter what size. It should be no different with marketing. Your written document lays out your game plan. If people leave, if new people arrive, if memories falter, if events bring pressure to alter the givens, the information in the written marketing plan stays intact to remind you of what you'd agreed on.
The benefits of Marketing Plan, including: to achieve better coordination of activities. To identify expected developments. To improve the organization's readiness to change. To minimize the irrational response to unexpected responses. To reduce conflicts about how organizations should move. To improve communication. To urge management to think systematically. To expand the adjustment of existing resources to elicit preferred opportunities.