First, you want your business plan to be read. No one is going to read a 100-page or even 40-page business plan. Sure, you may need supporting documentation for specific sections but you can include those elements in your Appendix.
Likewise, your business plan should answer these questions during the short-term period, particularly one year; specifically, what your business`s goals are for the current year, and what is essential in order to make your first year a success.
In the beginning, one may have the urge to delve straight into specific strategies, such as evaluating production methods, studying market segments, and evaluating the competition—but do not do that, at least not yet.
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.
It`s trendy to say investors don`t read business plans, but what actually happens is they only read business plans of the businesses they are interested in. They reject businesses from intro and pitch, without reading the business plan.
Investors and loan providers need to know that you have a solid understanding of the trajectory of your business. You need to prove that there is an attainable and sustainable need for your solution, that you have a strong business strategy, and that your business can be financially stable.