Thats a great detailed guide united. I dont disagree with anything in it, but.
A sole trader and even a partnership business will probably not need all the detail - although it is a good idea to get up to that
standard once the business is established. I always think that anyone not trained in business studies may be intimidated by having to produce such a detailed plan and needs to start with the essentials - i.e:
1. Purpose (which counts as a vision and overall key objective),
2. Objectives (which need to establish and stabilise the business in the early years).
3. A forward strategy (where we want to be in 3/5/10 years is always a good idea).
4 A few good contingency plans (what ifs).
I have qualified as an assessor under EFQM (the European Foundation for Quality Management) which sets out considerable detail on what is necessary to run a good business. And boy is that a deep analysis. However it does recognise that such a business is something to work towards, and a simple business plan is essential in the early days of the business to allow some clear direction without a fledgling business becoming bogged down in detail.
To sum up - your plan is something for small businesses to build up to - they dont need that much detail in the early days.