Another consideration. Should the business plan be a document that is focused on selling an idea for a product or service? For many years I worked in a company that did not want anything in a business plan that could be construed as showing a bias towards or against a project. The mantra was to only present facts in the business plan. The Operations Research Department was there to review the analysis as being unbiased. To handle the "what if" scenarios or sensitivity analysis we prepared a supplemental analysis documents which were mostly financial oriented. Personally, I like a factual approach and use the presentation of the final document to point out the conservative aspects of the content.
The time of the year to huddle all of your business colleagues in a room to hash out the key initiatives for the upcoming year. The time to throw everything up on the wall and try to get everything done in the first quarter. "This will be the year that all plans will be met" is the battle cry! Every vision, idea and strategy gets bantered about _ shouts of "there are no bad ideas!" fill the air. The room is electric with visionaries exchanging ideas on how their idea solves all issues, yet year after year, it seems that plans never actually come to fruition.