You
• have a product or service.
• wish to communicate to potential or existing customers about this.
• know your objective.
• know your schedule.
• wish to identify the means to do this.
• want this initiative to be definitive or derivative of existing material.
• want this to be a one shot or ongoing.
• know your target market, their likes and dislikes.
• want to know the cost of this.
• have source and background material and components needed for this project.
• have an idea and resources as examples or wish to begin with a clean slate.