Like anything else in business, a business plan should be judged good or bad not in a vacuum but in its business context with its specific business objective. Most of the online discussion about business plans is focused on business plans related to seeking investment, and I`m going to make the assumption in this answer that you are asking about those.
Working through your business plan, and starting with a one-page pitch, can help you test the viability of your business idea long before launching. As you work through everything from your branding and mission statement, to your opportunity and execution, the best thing you can do is get feedback and test different elements of your business.
But in real life, the plan related to seeking investment is a subset, a special case. Most real business plans are about managing a business and need a lot less description and research than the business plan related to seeking investment. In most cases, a lean business plan fits the business purpose best.
Because your executive summary is such a critical component of your business plan, you`ll want to make sure that it`s as clear and concise as possible. Cover the key highlights of your business, but don`t into too much detail. Ideally, your executive summary will be one to two pages at most, designed to be a quick read that sparks interest and makes your investors feel eager to hear more.
Whether you are in the beginning stages of starting your own business or planning on taking it to the next level, you will need a clear and informative business plan. `What is a business plan?` you may ask. In short, it is a comprehensive guide wherein answers to the questions and problems you will face in each stage of growth are laid out in detail.
There is value in doing an ample amount of preparation prior to creating a business plan: you construct creative solutions to complex problems. Make sure to take the time to do the job properly. Additionally, be sure to keep detailed notes on your sources of information and on the assumptions underlying your financial data.