Marketing Plan is a planned implementation of marketing resources to achieve marketing objectives. This means, Marketing Plan is a systematic process in designing and marketing of marketing decisions. The marketing plan will focus on information gathering, information dissemination formats and the structure of development and coordinating the company's strategic and tactical responses.
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.