Although the exact length and layout varies from company to company, most marketing plans cover one year in anywhere from 5 to 50 pages. Smaller businesses may create shorter or less formal marketing plans, whereas corporations generally require highly structured documents. To guide implementation effectively, every part of the plan must be described in considerable detail. Sometimes a company will post its marketing plan on an internal Web site so everyone can consult specific sections and collaborate on changes. A marketing plan usually contains the following sections.